I just moved from the previous v24.? to v25.0 this morning. I can't even open Illustrator anymore. It just lags, doesn't respond, then crashes altogether. I've uninstalled and reinstalled, restarted my Mac, removed old drivers, etc. Nada.
I'm having issues with latency, myself in Illustrator v25.0 There is literally a 2 second delay to everything I do, whether I am moving/scaling an object, panning the screen, etc. It all adds up and has become a huge time suck. I am running a Mac Pro 2019 OS Catalina 10.15.7 3.3 GHz 12-core processor, 32 GB memory, 8 GB GPU. There is no reason Illustrator should be running this slow.