Update: for some reason, Obsidian works again (had also issues with Finder BTW)
I remember having similar issues after enabling iCloud (somehow crash the computer :), maybe too many things to back-up). I cleaned a bit of my storage (almost full, Docker takes crazy amount of storage…) and things went better.
I have experienced the same issue in the last week, especially when renaming files and then Finder freezing out the whole Mac. I think in my case it is something to do with the vault being stored in iCloud.
I have gone so far as to wipe my Mac and clean reinstall everything. Still got the same problem.
I suspect this is down to Apple. I don’t have an Apple device that isn’t problematic these days.