The fundamental architecture of LLMs has not changed, so knowledge on that cannot be out of date.

Do I internalize the inner workings of all the libraries? Not unless it's necessary. Sometimes it is. If I want to read the source code of the function I'm calling, I can just do that, my IDE pulls up the file with one key combination.

I'm perfectly capable of reading source code myself, I don't need a non-deterministic filter in between.