Can one have year as bib labels for biblatex publist with plnumbered=false option?

Question

I'm using publist and would like to have lists of publications not numbered but formatted as in this question: Bibliography customization, year as bib label. MWE using publist is
documentclass{article}
usepackage[style=publist,boldyear=false,plnumbered=false,backend=biber,labeldateparts=false]{biblatex}
plauthorname[Gary]{Westfahl}
renewcommand{labelnamepunct}{addspace}
addbibresource{biblatex-examples.bib}    
begin{document}   
nocite{*}   
printbibliography[filter=mine]    
end{document}

yielding this result:

I'd like to have this

which is produced using the answer by gusbrs, based on the alphabetic style:
documentclass{article}

usepackage[style=alphabetic]{biblatex}

addbibresource{biblatex-examples.bib}

DeclareLabelalphaTemplate{
  labelelement{
    field[strwidth=4,strside=right]{year}
  }
}

defbibenvironment{bibliography}
  {list
     {printtext[labelalphawidth]{%
        printfield{labelprefix}%
        printfield{labelalpha}}}
     {setlength{labelwidth}{labelalphawidth}%
      setlength{leftmargin}{labelwidth}%
      setlength{labelsep}{biblabelsep}%
      addtolength{leftmargin}{labelsep}%
      setlength{itemsep}{bibitemsep}%
      setlength{parsep}{bibparsep}}%
      renewcommand*{makelabel}[1]{##1hss}}
  {endlist}
  {item}

renewbibmacro*{date}{%
    ifboolexpr{
        test {iffieldundef{month}}
        and
        test {iffieldundef{season}}
        }
    {}
    {printdate}}

renewbibmacro*{issue+date}{%
    ifboolexpr{
        test {iffieldundef{month}}
        and
        test {iffieldundef{season}}
        and
        test {iffieldundef{issue}}
        }
    {}
    {printtext[parens]{%
     printfield{issue}%
     setunit*{addspace}%
     printdate}}%
     newunit}

DeclareFieldFormat{labelalphawidth}{#1}

begin{document}

nocite{westfahl:space,westfahl:frontier}

printbibliography

end{document}

But I can't see how to transpose it to publist. Nor, alas, do I see how to port moewe's answer.
Thanks to moewe for his revised code on Bibliography customization, year as bib label; it now works perfectly!
But his answer to this question is just a tad short of fully working for my purposes.
One weird thing, changing the answer MWE to nocite{*} and running with latexmk I get an error:
! Illegal parameter number in definition of @tempb.
<to be read again> 
                   crcr 
l.327     endentry?

Letting latexmk run, the result has some entries run together. For example, wassenberg, herrmann & yoon appear together with year 2010.
Now, since as shown in the screenshot above I'd like no (round brackets) around the date I changed to DeclareFieldFormat{labeldatewidth}{#1}. I tried the author command plauthorname[Gary]{Westfahl} together with printbibliography[filter=mine], again with nocite{*}, with almost perfect results, except for an extra space, or “, ed.” for collections edited by only the cv author, right before the entry. Of course renewcommand{labelnamepunct}{} introduces the problem of omitting the needed space after publist's “(Some Coeditor).”

moewe · Answer

My fixed answer (thanks for the hint) to Bibliography customization, year as bib label is in principle also applicable to biblatex-publist, but it needs some slight modifications for the different macro names and calls of biblatex-publist. In particular biblatex-publist prints the date in bpl:year+labelyear, so we need to modify that bibmacro as well.
documentclass{scrartcl}

usepackage[style=publist]{biblatex}

DeclareFieldFormat{labeldatewidth}{mkbibparens{#1}}

makeatletter
defbibenvironment{bibliography}
  {list
     {printtext[labeldatewidth]{printlabeldate}}
     {setlength{labelwidth}{labeldatewidth}%
      setlength{leftmargin}{labelwidth}%
      setlength{labelsep}{biblabelsep}%
      addtolength{leftmargin}{labelsep}%
      setlength{itemsep}{bibitemsep}%
      setlength{parsep}{bibparsep}}%
      renewcommand*{makelabel}[1]{##1hss}}
  {endlist}
  {item}

renewbibmacro*{bpl:year+labelyear}{%
    iffieldundef{year}{%
        iffieldundef{pubstate}%
            {letbbx@lasthashundefined}%
            {%
             usebibmacro{bpl:date:labeldate+extradate}%
             savefield{pubstate}{bbx@lasthash}%
             clearfield{pubstate}%
            }%
    }{%
           ifboolexpr{
             test {iflabeldateisdate}
             and
             not test {ifdateshavedifferentprecision{label}{}}
           }
           {printunit{}}
           {usebibmacro{bpl:date:labeldate+extradate}}%
         savefield{year}{bbx@lasthash}%
         clearfield{year}%
    }%
}

renewbibmacro*{author}{%
    if@hlauthor
        ifnameundef{author}
            {}
            {%
             usebibmacro{bpl:marginyear}%
             printnames[][-value{listtotal}]{author}%
             setunit{addspace}%
             iffieldundef{nameaddon}
                 {}
                 {%
                  mkbibbrackets{%
                      bibstring{alias}%
                      addspaceprintfield{nameaddon}%
                  }%
                 }%
            }%
        adddotaddspaceusebibmacro{bpl:year+labelyear}%
    else% if@hlauthor false
        ifnameundef{author}
            {}
            {%
             usebibmacro{bpl:marginyear}%
             usebibmacro{bpl:year+labelyear}setunit{addspace}%
             printnames[][-value{listtotal}]{author}%
             setunit{addspace}%
             iffieldundef{nameaddon}
                 {}
                 {%
                  mkbibbrackets{%
                      bibstring{alias}%
                      addspaceprintfield{nameaddon}%
                  }%
                 }%
            }%
    fi% end of if@hlauthor else condition
}

renewbibmacro*{editor}{%
    if@hlauthor
        ifnameundef{editor}
            {}
            {%
             usebibmacro{bpl:marginyear}%
             printnames[][-value{listtotal}]{editor}%
             setunit{printdelim{editortypedelim}}%
             usebibmacro{editorstrg}%
            }%
            setunit{adddotaddspace}%
            usebibmacro{bpl:year+labelyear}%
            clearname{editor}%
    else% if@hlauthor false
        ifnameundef{editor}
            {}
            {%
             usebibmacro{bpl:marginyear}%
             usebibmacro{bpl:year+labelyear}%
             setunit{addspace}%
             printnames[][-value{listtotal}]{editor}%
             setunit{printdelim{editortypedelim}}%
             usebibmacro{editorstrg}%
             clearname{editor}%
            }%
    fi% end of if@hlauthor else condition
}

renewbibmacro*{editor+others}{%
    if@hlauthor
        ifboolexpr{
            test ifuseeditor
            and not test {ifnameundef{editor}}}
            {%
             usebibmacro{bpl:marginyear}%
             printnames[][-value{listtotal}]{editor}%
             setunit{printdelim{editortypedelim}}%
             usebibmacro{editor+othersstrg}%
             setunit{adddotaddspace}%
             usebibmacro{bpl:year+labelyear}%
             clearname{editor}%
            }
            {}%
    else% if@hlauthor false
        ifboolexpr{
            test ifuseeditor
            and not test {ifnameundef{editor}}}
            {%
             usebibmacro{bpl:marginyear}%
             usebibmacro{bpl:year+labelyear}%
             setunit{addspace}%
             printnames[][-value{listtotal}]{editor}%
             setunit{printdelim{editortypedelim}}%
             usebibmacro{editor+othersstrg}%
             clearname{editor}%
            }
            {}%
    fi% end of if@hlauthor else condition
}

newlength{labeldatewidth}
newlength{locallabeldatewidth}

apptoabx@dolabelwidths{do{labeldate}}

AtDataInput{%
  nottoggle{blx@skipbib}
    {begingroup
     blx@getlabeldata
     blx@setlabwidth{labeldatewidth}{%
       printtext[labeldatewidth]{printlabeldate}}%
     endgroup}
    {}}

AtEveryBibitem{%
  blx@setlabwidth{locallabeldatewidth}{%
     printtext[labeldatewidth]{printlabeldate}}}

newrobustcmd*{changedateformat}[2]{%
  csdef{blx@dateformat@#1date}{#2}%
  protectedcsdef{blx@imc@print#1date}{csuse{mkdaterange#2}{#1}}%
  protectedcsdef{blx@imc@print#1dateextra}{csuse{mkdaterange#2extra}{#1}}}
makeatletter

addbibresource{biblatex-examples.bib}

begin{document}
nocite{sigfridsson,worman,geer}

printbibliography
end{document}

Can one have year as bib labels for biblatex publist with plnumbered=false option?

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