Like if Microsoft released their own Linux OS, would it be good suddenly?
It's worth noting that steamOS, like any Linux distro has its issues and a bit of a learning curve. Especially if you want to go off the beaten track, it's pretty much just using a stock arch distro.
As for if MS switched to Linux, no it wouldn't be good because the issues with Win11 overwhelmingly aren't a matter of incompetence or anything inherent to the code, but of conscious anti-consumer business decisions. There's nothing about Linux that would actively stop MS from cramming telemetry, bloat, etc. In their distro.
Pretty sure those AA batteries will lose their charge and get corroded to shit before 10 years pass