Perl 5 hasn't been able to produce any major feature warranting a major version number upgrade over the last 20 (or actually 24) years, and you just said that you don't disagree with that point of view. Gee, almost a quarter century without a really major change.
For somewhere between 10 and 17 of those years, something has been in the way of those major features, whether putting pressure on Perl to stop being a moving target, to prepare for a port to a new platform, to maintain syntactical compatibility, or whatever.
As the kids these days say, I'm old enough to remember Larry sitting in my hotel room adding MAD to Perl to make it easier to translate Perl code to P6. Keeping that experiment around was enough of a drag on Perl maintenance that it was eventually torn out entirely. You can't say that about most features in Perl, and there are a fair few that should be removed.