At least back when win10 was new, Proton is good enough that I haven't needed Windows in a good few years.
Put all your fun things on one OS (or user account), and all your business stuff on another (possibly blocking distractions via hosts or firewall rules); and you've added a bunch of friction to switching from work to play. Not that it can't be done, but it needs to be a deliberate choice and you can't just bounce between them.
I don't really have a set work schedule, so it's normal for me to jump between a work context and a play context. It's much easier to do by very rarely rebooting my computer (once or twice a month), so I can always pick up where I left off. The regularly scheduled update meetings do a good enough job of keeping procrastination in check.