Just updated a 2019 iMac to a 14.3.1 fresh install from a downloaded installer on a newly formatted 1 TB external SSD. I see a spinning cursor with just about everything I do. Even with only BBEdit running, going back and forth between 2 windows, the cursor spins for 4 or 5 seconds each time. Same for moving between 2 running apps. Any suggestions how to improve things?