Wherever you look, the conclusion is the same - balance is required. Too many seniors, you get stuck in one way streets. Too many juniors, you trip over your own feet and diverge into unknown avenues. Mix AI in, I don't see how that changes much at all... Juniors drive into unknown territory faster, Seniors get stuck in their niche just as well. Acceleration yes, fundamental change of how we work - I don't see it yet.