If they do not also increase the senior devs’ allotted time for code reviews to make up for the increased volume of changes due to increased productivity of the junior to mid level devs, or hire more seniors, this will just lead to burnout (on top of Amazon’s already high levels) and scapegoating seniors for having waved through a change because they materially can’t review them fast enough.

Id maybe consider spinning out a different job role for like "review engineer" who's not busy making strategic decisions and near term planning, just making sure the code is actually good

still within the engineering IC role, but on a different track