I encountered pretty bad performance issues when moving from FMS18 (Intel) to FMS19 (M1) - an almost 10x slowdown in some procedures. But I didn't see other people reporting this, so I figured it might just be a quirk of my databases?
See FMS19.6.3 poor performance on M1 mini / Ventura
Very curious to see if anyone has had performance deltas (positive or negative) with version 20.