Single click is fantastic. I don't understand why anyone would do it differently. Everything on the web is single click. Task bar items are single click. Menu items are single click.
KDE got single click right when Microsoft didn't.
So why would I not want a single unified experience? I don't accidently open anything, that is just nonsense.
Just tested in Word and revision history did no have several of the revisions a lot was lost. It is far worse in Excel. I will stick to manual saving. And I did that with an Enterprise account using business one drive.
Just as a sidenote: I am comfortable in Libre or Micsosoft Office, I have found good reasons for both over the years, and they both have auto recovery (which is the most important) and both can by autosave. But my preference is to manage my changes myself.