As someone that was already working during the dotcom wave, Perl is a tool I would still reach for, given the problem I might trying to sort out, if on an UNIX like platform.

> Binary package managers that chase down dependencies on their own weren’t a thing until the early 2000s, I think?

UNIX package managers started to be made available during the 1990's.

Yes, but they were either source package managers or they didn't resolve dependencies transitively, only complained about missing direct dependencies.