There should be one-- and preferably only one --obvious way to do it.
There is a new package manager every year. Language features are introduced every major release.
There is still a lot of perl around but I'd be a little surprised if any new projects would use it at least where it doesn't already have a big presence.
I agree with the intention of the quote, sadly it didn't work out like that.
Larry Wall originally wanted to call it "Pearl", but found there was already a language by that name, so he shortened it to "Perl".
The name is sometimes expanded as "Practical Extraction and Report Language", or as "Pathologically Eclectic Rubbish Lister" (Larry Wall's own phrase, mentioned in the Perl man page).
But yes, "Perl", not "PERL", is the correct name for the language.
(Ada, which was named after a person, has had the same problem, though as far as I know there isn't even a retronym for Ada.)
https://www.youtube.com/watch?v=1kFnHPHBcb4
Did you know Ada and Linda were both named after unrelated people with the same last name?