Right. And if one checks out MooseX::* on CPAN, it becomes evident that Moose itself is still developing and advancing. And since Moose itself is a library, updating it independently from Perl is a big win as well. I don't need to upgrade Perl and my whole ecosystem just to use a newer or better MooseX extension. Not mentioning the fact that Moose is optional, and its overhead can be skipped by falling back to pure Perl OO or lighter OO libraries when required. It all makes my job easier :)