Honestly, Obsidian with iCloud is so bad, that I'm afraid to pay for Obsidian Sync because half the time the errors and freezing of the Obsidian app seem like they have nothing at all to do with iCloud. It's really hard to tell, because Obsidian doesn't surface any errors, it just randomly freezes and has trouble opening files that should be there.

It's just n=1 but I haven't had any random freezes or files that failed to open while using Obsidian / Obsidian Sync.