It’s crazy to me the way that all of the also-ran handhelds seem bent on putting a desktop OS on these things. The steam deck didn’t succeed in spite of its lack of windows, it succeeded BECAUSE it ran a purpose built OS.
Like imagine looking at a market where the Switch exists and saying “My path to victory is Microsoft Windows, that is what the people are demanding!”
Even worse is that there almost certainly going to be some sort of handheld optimized windows release in the coming years from MS and they have zero incentive to license it to hardware OEMs. Best case for MSI et al is that they build a market for MS to steal from them in a year or two.
There already is a handheld optimized MS OS, the xbox. It's made to be used with a controller on screen of any size, if they baked in the support for PC games they would be 90% of the way to a Steam Deck.