"With all due respect, tobyink; How do you know? What makes you think so?"
Because this is true for any mainstream programming language - there are always people abandoning the language for pastures new, and new people discovering the language; there are organizations rewriting a legacy application in a different language (in fact, choosing a different language to rewrite a legacy system is a good idea - it helps ensure crufty parts of the old system don't get kept around for convenience); people switching jobs and having to adjust to a new development environment.
use Moops; class Cow :rw { has name => (default => 'Ermintrude') }; say Cow->new->name