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I haven't noticed any issues. But only Plasma would be a DE. Qtile and hyprland are WM, not sure if that makes the difference.
Initially I had doubts if it would work, but so far so good.

Nice work. Why move from plasma to hyprland? Install both and login on the environment you want at any time. I have qtile, plasma and hyprland

I have arch and plasma 6.
My doubts would be the dual booting with windows. Maybe go with grub for the boot.
From what I've seen on the news Nvidia cards are getting much better drivers these days, it depends on the age of the card, newer cards will not perform well, the drivers are always behind because Nvidia won't release the code so everything is retro engineered. Still better than 3 or more years ago. The Protondb page can help with some games but if the game is deck verified, most likely it plays on Linux. Don't wait, there's never a perfect time on Linux, it's always evolving and getting better. To daily drive, expect things to fail, but with plasma 6 I'm sure you'll have everything working out of the box and it'll be a breeze.

Have a look at this.
https://pine64eu.com/product/pinetime-smartwatch-sealed/

You can see the specs and get the idea of what you might need

I use it on my home server, TUI only, when I want to organise my files

Enjoying so far. Thanks