Perl 6 is actually a joy to code in, as weird as that sounds. It's fairly straightforward to begin using, but the deeper I go the more I see the huge benefit to its long development which was mainly in spec-writing. The two killer features (for my work, at least) have been the grammars (a sort of regex on steroids that is actually readable) and the multiparadigm approach. I mean you can do functional coding with Javascript sort of, but you end up with a lot of extra line noise compared to P6 where it was contempalted from the beginning (and multisubs clear things up even more). All the typical paradigms are integrated fairly seamlessly to let you choose the best tool for the job for whatever block of coding you're working on.

  multi sub eat-pie( Pie slice where *.is-custard ) { ... }
  
  multi sub eat-pie( Pie slice where *.is-fruit ) { ... }

  multi sub eat-pie( Pie slice ) { ... }

  eat-pie( a-slice-of-pie );

There are two programming languages that I learned in their first 5 years. They both ended up being languages I dislike. A language that takes time to mature and isn't the pop language of the week sounds terrific to me.

Good languages stay in use for decades. If I miss the first 5-10 years of a new programming language, either I'll skip its turbulent youth and still be around for most of its life, or it'll turn out to have been a flash-in-the-pan language and I'll have missed nothing.

If you want to be fancy you can run the JS implementation of the Rakudo compiler in browser targeting JS https://perl6.github.io/6pad/#b66f6f0eb46f296b8a285c45a152f1...