Not particularly since you seem very combative... but here it goes, from the top of my head: without Moose/Moo etc OOP is (was? no clue, I don't follow development any more) just cumbersome and archaic (and with it you'll run into strange things when you hit errors), support in modern IDEs is lacking, there are few developers and therefore a smaller community, it's often not among the officially provided SDKs etc. Those are all interconnected. You can't easily hire Perl developers. Nobody wants to pay large sums to compete about the few there are to provide an SDK for a language that is on its way out. Nobody wants to work with a language that's not really supported by businesses. There's no large community to improve tools. Of course, I don't mean literally nobody, just very little. It's a vicious circle.

I liked Perl (it has a special place in my heart), I've written a ton of stuff in Perl, some of it I still support, but I can't say that I've missed it in the last five or so years since I've stopped actively writing it. I still occasionally log into the perl-focused community I used to frequent and they are still getting about a post a week. I never gave Perl6 a chance, simply because it would be a switch to another language where knowing Perl didn't really transfer, so I might as well go where the music plays. And yeah, CPAN-modules are nice and all, but a lot of it always looked to me as if written for a contest of clever code, not to be read & understood easily.