One thing I've found is that while I work with a LLM and it can do things way faster than me, the other side of it is I'm quickly loosing understand of the deeper code.
If someone asks me a question about something I've worked on, I might be able to give an answer about some deep functionality.
At the moment I'm working with a LLM on a 3D game and while it works, I would need to rebuild it to understand all the elements of it.
For me this is my biggest fear - not that LLMs can code, but that they do so at such a volume that in a generation or two no one will understand how the code works.