@mjgardner
Yes. I had a couple unpleasant encounters with the ~~ operator when we were forced to upgrade our production Perl libraries, due to Debian releases.
The company's entire online (web app) codebase was in Perl, well after it should have been retired. It probably still is??? I tried to push them toward Python, or even PHP, but the "head shed" had been there since the 1990s, and any significant change was viewed as a loss of control. 🙄