It's just the first cut (for all companies). You can't do 50% right away as you don't know what will happen, so you need to do in steps. If they were just 7% over hired then they could just do attrition + a bit tougher perf reviews, or close a few teams over the course of a year but there is high chance for all companies they are not 10% or 7% or 15% over hired but 50%