Comment by dspillett

But having learned from the feedback they or you then go off to work on something else and, unless you move onwards/upwards/both in perfect sync, and you end up with new juniors who need the feedback afresh.

Also: I've always avoided being anything like a lead or manager, but I do effectively have a couple of relative juniors ATM who I wish would have a better long-term learn/forget ratio when it comes to feedback from myself and elsewhere!