Manually typing in code is an underappreciated trick in a lot of circumstances. It's one of the fastest ways to get to grips with a certain piece of code, a new library, or some methodology.

This was true when I first learned to program, and is still true today. And I do find myself manually typing in really critical code. In those cases even if I do have an LLM alongside these days, LLM suggestions also then get manually typed.