[tessierashpool]

there are, I am, and it's not (sorry). some languages have the ability to comment regexes, and that would be very useful here.

[staunton]

It has lots of comments inside the regexes. How would this better comment support look like?

[sundarurfriend]

These are not technically "comments inside the regexes", that would be something like the "Delete (most) C comments." regex here: https://perldoc.perl.org/perlre#/x-and-/xx

Here, instead, they've used string juxtaposition cleverly to write comments between parts of the regex/string. It effectively serves the same purpose though.