In the future I plan on relegating it to a VM on a separate VLAN to keep the cooties at bay.
That's the problem. Most Linux users need Windows for something. I use mostly Linux, but I also have a Windows boot partition. For things like gaming, Fusion 360, VR,... Some things don't work that well on Linux: YouTube sometimes gets out of sync, print quality is really bad,...
On the other hand, I don't really need Linux, except for jobs that involve Linux specifically, and these are pretty technical jobs, far from a typical use case for non tech workers. And even with such tech jobs, >90% of these cases could be dealt with with WSL.
There is a video by LinuxTechTips where he tries to go 100% Linux, he is relatively successful but it is painful. I love this video because I think it is representative of the experience of a computer-savvy consumer.
On the other hand, if auto-restarts are a real problem to you, you are probably not a typical user. For most, it is an annoyance, but not really a problem, and it can be important for security. I don't really mind them personally, except that my dual-boot machine restarts on Linux (the default) when Windows does that, with the update process paused half way, annoying.
For work, my work laptop is Windows and provided/maintained by internal IT. I support exclusively Linux based systems for our customer facing product, and the main reason I keep the Windows install on is so I can make any workstation issues a helpdesk issue.
In general though I've had no issues getting Office 365 working on Linux (Chromium / Chrome is best supported, but Firefox works OK too for most functions).