I found that since LLMs can produce any code I want, I don't really feel the same drive to learn React or whatever is popular and trendy to make myself useful in a new job. Instead I feel like I have the space to play with something that I enjoy instead, like learning Z80 assembly and writing games for the Gameboy that I would have wanted as a kid. I think you're right that it feels just like going to the gym, intellectually.