Have you noticed any difference in picking up the language(s) yourself? As in, do you think you'd be more fluent in it by now without all the help? Or perhaps less? Genuine question.
When I stray out of this (e.g. I started doing a lot of IoT, ML and Robotics projects, where I can't always use TypeScript). I think one key thing that LLMs have helped me is that I can ask why something is X without having to worry about sounding stupid or annoying.
So I think it has enabled me at least a way to get out of the TypeScript zone more worry free without losing productivity. And I do think I learn a lot, although I'm relating a lot of it on my JS/TS heavy experience.
To me the ability to ask stupid questions without fear of judgment or accidentally offending someone - it's just amazing.
I used to overthink a lot before LLMs, but they have helped me with that aspect, I think a lot.
I sometimes think that no one except LLMs would have the patience for me if I didn't filter my thoughts always.
I have brains and can verify if it's correct or not.
I do thoroughly review of the the LLM answers, and hardly every directly copy paste answer, so I feel this way I still learn the language.