Ah, I am glad the name change happened. I got side tracked before it came to a conclusion. I'm guessing if it didn't happen then, it surely would have to be changed now because of this new version, which looks like far less of a fork in the road.

I know some people aren't fans of Perl5, but it's what I learned and I wasn't all that excited to have to toss everything I knew (and my reference books) just because of a new version number. If Perl6 turns out to be complementary as people were saying/hoping, maybe Perl7 is where we get to see the interplay.

Perl 6 has been renamed to Raku (https://raku.org using the #rakulang tag on social media). You can run Perl inside of it if you want to, with the Inline::Perl5 module. Check out the Rakudo Weekly News https://rakudoweekly.blog if you want to stay up-to-date!

I'm surprised to see .pm6 extension still being used, at least on the rakudo documentation page. Do those contain Raku code, or Perl?

These would contain Raku code. But as with Perl, the core developers value backward compatibility much. Since many versions of Raku in use do not know of the new .rakumod extension yet, the old extension is used for many modules still.

This is probably going to change in the next language revision of Raku. See https://github.com/Raku/problem-solving/blob/master/solution... for the nitty gritty.