How much code was "written by" autocomplete before LLMs came along? From my experience, LLM integration is advanced autocomplete. 25% is believable, but misleading.
The pool of programmers has grown. There are more good programmers than ever, but the barrier to entry is also lower. It isn't necessary to pass through that kind of trial by fire anymore.
Seconding this recommendation. As long as you have a basic understanding of electric components he's really easy to follow and does a great job of explaining how the circuits work.