Happy birthday, Perl.
Paradoxically, Perl 6/Raku's extremely long development cycle has led to Perl 5 "stagnation", in other words stability, which is a good thing.
Personally, I didn't like that Perl has spoiled the concept of regexps with (Turing-complete?) constructs when it originally was beautifully aligned with the regular/context-free-and-above language dichotomy.
And that Perl came to replace my beloved, and portable, awk/shell scripts.
Aaand that Perl, for a while, usurped the ".pl" file suffix, when everybody knows it belongs to Prolog programs.