I suspect this is not true. Evals are far more common that stacking.
Btw when you do do this, 4 pretty much never works, and generate a political layer around it.
Perversely, at the group level it raises the value of lower performers, mostly as "chips".
After surviving what feels like a dozen rounds of layoffs over the past year, morale is already non-existent. You can go weeks and sometimes months without even hearing a peep from the people you once thought were the brightest and hardest working. The whole thing just feels in need of a reboot. Is this consistent across all companies at the moment or is it just time for me to leave?