What?! Whole industries have been changed already due to products based on them. I don't think there's a single developer who is not using AI to get help while coding, and if you aren't, sorry but you're just missing out, it's not perfect but it doesn't need to be. It just needs to be better than StackOverflow and googling around for the docs or how to do things and ending up in dubious sites, and it absolutely is.
My wife is a researcher and has to read LOTS of papers. Letting AI summarize it has made her enormously more efficient at filtering out what she needs to go into more detail.
Generating relevant images for blog posts is now so easy to do (you may not like it, but as an author who used to use irrelevant photos before instead, I love it when you use it tastefully).
Seriously, I can't even believe someone in 2024 can say there has not been useful applications of LLMs (almost all AI now is based on LLMs as far as I know) with a straight face.