Do you think that its possible to raise the bar for junior engineers such that "you have AI now, so I need you to own farther up the review chain yourself"? I feel like I could answer either way. No, you need reps on projects to have that kind of judgement, that's what makes a senior. But also yes, while it will take the junior way longer to do that kind of review, they have the time to do it now, and its now the bottleneck so it makes sense to put their effort into that portion.