Re: FFS
"college and university computer science departments teach it"
They taught the OSI model well into the 2000s ... even though it had been essentially obsolete for well over 20 years prior. Your point?
"On the other hand, most Perl programmers are retired."
My Granddaughter isn't even in high school yet. She codes in perl (among other languages). Same for a couple of my younger nieces and nephews. They have all also learned Python, but rarely use it ... there is always a better language to code whatever project they are working on in.