Microsoft broke autosave in Word, forcing you to use OneDrive for it
twitter.com
twitter.com
The top answer correctly notes that AutoSave, which is different from AutoRecover, has only ever worked for OneDrive. It seems like the author of the tweet is thinking of AutoRecover, but there's no evidence that AutoRecover is broken beyond one user's vague statement that it didn't work for them.
Also while that post is confusing and weird, it wasn't written by someone from microsoft.