(There's now browser based versions of MS Office apps that can simultaneously edit documents stored and automatically version controlled in SharePoint)
In some ways it was truly awful, to mention two examples:
- a reason for using it was to automatically apply Azure Information Protection to documents. All well and good until it turns out the mechanism can trivially be subverted, so trivially that we found out by accident by not following the exact login procedure.
- the usability makes is comparable to Oracle software. I have extensive experience with that too, but I can't say which is worse.
It's certainly not non-existent.
(There's now browser based versions of MS Office apps that can simultaneously edit documents stored and automatically version controlled in SharePoint)