Most people - especially those without critical thinking - are clicking buttons in browser based CRM systems. Or using some other web-gui hold their hand and query or transact with a database. OS makes no difference to them.
Even my very slow public sector org has moved most of its database interfaces to web apps by now - though i think there re still two important native windows (probably DOS) applications.
Apart from those something like Chrome OS or OSX would probably be best for them - they just need a stable, up to date web browser.
with cloud storage, and even MS pushing people to web apps, even paper pushers working via documents can still just use browser for stuff, and many are.
Lots of people i work with suck so badly at MS Word that they don’t even know how shitty the web version is. They literally just click stuff and if the OS opens a web interface, then that’s what they use.
Most of these people use androids or i phones for lots of things, so they certainly are capable of using things that are not windows - they just learn what buttons they need to click to do what. Like they would’ve in the 70s/80s with a unix terminal. Or in the 30s if they were operating a telephone switchboard.
Breaking onedrive? I’m confused. It’s like that thing in Southpark “How do you kill that which has no life?”