What killed Perl for me was readability, long before Perl 6/Raku. I was an Awk programmer from way back, so took to Perl quickly once it was available. Then in the late 90's I wrote a utility program in Perl that generated some nice HTML documentation for me from some kind of input format I no longer recall.

A year later I tried to use that script on another project, but had to make some changes; and couldn't make heads or tails of it. Shortly thereafter I had occasion to look at some Tcl/Tk I'd written at about the same time...and it made perfect sense to me.

Had I used Perl on a daily basis, rather than occasionally, I might have stuck with it. Instead I switched to Tcl/Tk, and never regretted it.