I always regret writing bash scripts, which start really simple, but tr require refactoring into perl after a few days.
Only problem with perl I've run into is analysing text at speed - 60,000 lines a second of regex doesn't work on a raspberry pi or other low end processor.
Should you write your entire codebase in Perl, in 2018? hell no
But you probably shouldn't be writing anything more than 10-20 lines in Bash, either, and this class of organically evolving script, with little attention to design at the start (much like the language itself) is where Perl really shines.