Earlier quoted context omitted.
I think you gave it backwards. Or at least it goes both ways. Long tenure naturally results in becoming L6 if you have a boss who develops you and aims to get you there (+ understands how to work in the review/promotion system and check the boxes.) Maybe I misinterpreted, but it sounds like you deify L6 engineers as "better" and that's why they remain. I don't think that's exactly it lol. Also..people leaving in 2 ye…
Which is a very sensible plan to have. My biggest mistake was to not have an exit strategy I followed from day one. But than LVL 5, or 4, at Amazon isn't that bad. You have probably more responsibility than a LVL-6 equivalent at any other non-FAANG corp.
I agree with you on Amazon not being so bad. I had a lot of autonomy and was asked to both be an engineer and build technical solutions and own processes end-to-end (which included some project management.) It was a great experience!