I got a Mac Studio (M1 Max, 64GB, Ventura) in January and the Pegasus just hasn't quite been right. If I go to open a folder (in finder or within an app) it can take quite awhile for it to actually open - it spins and says 'loading' and eventually loads. And a lot of the dates on files don't update; they're still older dates. I tried to run First Aid in Disk Utility but it said it couldn't unmount the volume and thus did nothing. Not sure what to do.
Results of Blackmagic disk test attached. Seems fast in general, but folders open slowly often.