Both posts (March, November) fingering the latest version. I don’t think it can be the same latest version.
The sync providers mentioned are iCloud, Box and Sync.
Some of the problems may be purely down to the sync service. If it reverts the underlying file, what would you suggest Obsidian do? Overwrite when it finally saves, or save current version as copy2? This is the case whether autosave is functioning or not, since turning autosave off simply defers the issue to the save at the end.
afaics, Obsidian’s only options are merge, overwrite, lose the edit or create a second copy.
Personally, I want Obsidian watching and updating the file because I might well edit a file it has open in another program. All the programs I use work this way. And I see no evidence that autosave is producing widespread problems - there would be far more problems reported if that were so.