Perl, the first postmodern computer language (1999)
...to this day, I still can't wrap my head on how PHP even got to exist in a world where Perl was already filling the web niche just fine.Also, if they wouldn't have made it too-weird-for-math-and-physics people, Perl would've probably filled Python's niche too.And with that kind of resources focused on it, Perl 6 could've actually turned up into a clean nice new language that would've unified us all by also supporting nice compile-to-wasm.