Don't get me started... Office these days adds friction if you want to save documents anywhere but the Documents folder (where they get uploaded to OneDrive if you have it set up).
They've also disabled auto-save if you don't have the documents backed up by OneDrive, which is the most egregious for me.
Office has never had auto-save for local documents; it only had (and still has) periodic recovery saves. The primary reason they added auto-save for cloud documents is to facilitate multiplayer online editing.
They've also disabled auto-save if you don't have the documents backed up by OneDrive, which is the most egregious for me.