Not the person you asked, but for me short version: it just works and covers 100% of my uses cases and never caused me any issues, so why should I needlessly complicate my life by using something else?

Long version: most EE tinkering and embedded tooling is almost Windows exclusive especially retro ones, plus the much better window management out of the box, plus support for all games and modding tools ever released without having to think of emulation or compatibility, plus 20 years of muscle memory and know-how on how maintain the system, plus high quality tools like Notepad++ , ClickDDC & such, plus it runs on every HW from 50$ second hand laptops to latest Intel & Ryzen machines meaning I can pick the exact laptop with the HW features that fit me, and not forced to buy exclusively Apple's expensive and restrictive HW like a screen that only opens ~130 degrees.

When I'm moving away from it it will be to Linux, not another commercial sollution that comes with extra expense, downsides and limitations.

That's an exaggeration. There are definitely games where you might consider working better in Proton but for the most part Windows is still the far more seamless option. On Proton, ive still hit things like, really bad frametimes, game patches that break things for a bit, can't get VRR to work ever, and the lack of anti cheat support in multiplayer games.

What I'd like is the windows user experience but not broken as fuck and with the breadth of default high quality applications you get on macOS and the hardware flexibility of a PC.

I am curious how well proton works under ARM, both for apple silicon and whatever alternatives.