That might work for government employees using webapps all day. But for power users it is unlikely to be friction free.
Over the years I've come to believe that there is only one thing important: What you are used to. The friction is in the change process. Not in the destination.
As an independent, I have several customers on MS365, you know what my super power is? FireFox cookie containers. One for each org, and I switch with 0 effort between the orgs. No need for Windows in that workflow at all. In fact, using Windows and the native apps would probably give me a lot more friction.
Yes, sometimes I have issues. I.e. yesterday Word kept deleting my last 1-2 sentences for some reason, even though hitting ctrl-s tells everytime: "I should not worry". but in general it's fine.
My business is on Proton, and I love that MS365 AND Google workspace calender invites go right into my agenda with no effort. There is nice stuff out there. Especially now we have Proton Meet, I can take some ownership over videocalls in Teams and Google Meet finally.