I think I'm good at code review, but we've all seen parts of the codebase where it's written by one teammate with specific domain knowledge and your option is to approve something you don't fully understand or to learn the background necessary to understand it.

In my experience, not having to learn the background is the biggest time saver provided by LLM coding (e.g. not having to read through API docs or confirm details of a file format or understand some algorithm). So in a way I feel like there is a fundamental tension.