I have learned a ton of things that didn't carry over to what I do in the industry. That doesn't make those useless, unpractical theoretical BS. The issue with

I have learned a ton of things that didn't carry over to what I do in the industry. That doesn't make those useless, unpractical theoretical BS. The issue with your POV is, IMO, that you lack imagination for how vast the industry really is. There are millions of problems that are being solved with Python, PHP, Java, you name it, that can as well be done with Haskell. And constraining those solutions through the lens of "how computers really work" is unpractical, theoretical BS.