On: Mercurial’s journey to and reflections on Python 3

[lizmat]

Re: Often cited is the fact that Perl 6 is a totally different language unrelated by anything but creator and name

Indeed. That is why Perl 6 has been renamed to Raku (https://raku.org using the #rakulang tag on social media).

I'm not sure what lessons can be drawn from this, other than being indecisive has its price.