Other than a brief spell of Win-curiosity when I boarded the current mothership, I've survived without Windows since XP. I still have flashbacks, of course, but regular 240v ECT keeps them at bay. In the early days of Mac (it wasn't a path of purposeful conversion, I saw a Macbook c2007 and thought that looks nicer than my Windows laptop, I was still baking my own desktop PCs at the time) I ran a Windows VM but I can't remember the last time I needed to do that. I think it's still XP.
Office365 is 99.9% compatible re formating etc. between Windows and Macs, my mothership are mostly Windows, and there's never a problem (Windows still doesn't know how to manage fonts, but at this stage, that's more nostalgia than a failing). There are still a few missing features (like really, a way to manage links and embedded objects, I mean really). You just have to accept that Powerpoint and Word are awful regardless. OK, I have a secret dungeonlove for Excel but then who doesn't?