There is a human component to consider: in the case of a change in the interview process, with the new process perceived as easier than the past and current ones, I imagine the bitter protests from the currently employed engineers who would vocally complain that the quality of new hires is much worse than it used to be, and that they have had to pass much more stringent interviews than the new ones, which even a junior SWE employed in an unnamed company would be able to pass.