Recently tried MS Office apps for the first time in 8 or so years. Somehow they made them less intuitive than even ribbon days. They use a dark pattern save dialog that makes it easy to accidentally save to OneDrive, and if you have OneDrive disabled or uninstalled, there's an always present icon in the title bar of the main edit window that says "autosave off" even though autosave is on.

Went right back to LibreOffice after one document and one spreadsheet.