Thanks for the long details, dude.
I just use Windows to run games. I need nothing else on Windows. So Tiny11 is good enough for me.
In terms of safety, I don’t store any information on Windows, so I never update it. It’s just a gaming tool for me.
If my game accounts like Ubisoft, Steam, or GOG are leaked, it’s acceptable. They are just some email addresses and automatically generated passcodes, easy to update. It’s not important.
And the file systems used by Windows and Linux partitions aren’t mutually readable, so running games on Windows is hardly likely to affect the safety of the Linux partition. It’s perfect.
I just bought the Steam Deck 3 days ago. And I like modding ES5 and Cyberpunk 2077. So I will!