I think the biggest challenge now becomes how more seasoned engineers teach juniors. The AI makes the ramp a lot easier but you still do best when you understand the whole stack and make mistakes.

It’s damned near impossible to figure out where to spend your time wisely to correct an assumption a human made vs. an AI on a blended pull request. All of the learning that happens during PR review is at risk in this way and I’m not sure where we will get it back yet. (Outside of an AI telling you - which, to be fair, there are some good review bots out there)