and also killed off improving Perl 5
By taking the Perl 6 moniker, whether intentionally or not the team made it nearly impossible to create a major revision to Perl 5. Instead the "original" Perl has been incrementally building out to the current 5.30.0 version. If the Rakudo/Camilia quit refering to themselves as Perl 6 then perhaps a proper successor to Perl 5 will be developed (Perl 7, Perl X?) and I won't have to explicitly declare features that have been around since Perl 5.10 (can you say "say").