Microsoft not understanding that I just don't want Windows.
I don't want to pay for it, I don't want to use it, I don't want things made exclusively for it, and I don't want to have to deal with it.
A game console, of all things, is a "turn it on, play a game" device. It really doesn't need anything you couldn't make with an ancient OS and a couple of menu JPEGs. It certainly doesn't need Windows.
I waited years for the "Steambox / Steam Machine" concept to actually take off, and then I bought several Steam Decks for friends and family. Not because it could run everything, it doesn't need to (but mine can actually run things Windows can't, like games designed for old Windows, ironically!). Not even because it can run things faster (it literally shouldn't be able to run things faster than Windows, but does solely becaus Windows has been so sucky for 20+ years). But because it's NOT WINDOWS.
Nobody wanted it on their phone, nobody wanted it in a tablet, nobody wants it in their handheld. Hell, I judge XBox people but even those have moved so far from being Windows machines that it's laughable how unconfigurable their core OS actually is that they couldn't even retain that themselves. Surely any well-designed modern OS should just be a matter of the same code, compiled to the right architecture and then configured to remove the irrelevant gumph on a standard deployment method, no? Apparently not. The XBox OS should an Autopilot config, as far as I'm concerned.
But I don't want any of that. I want something non-Windows. Deliberately. Because Windows just isn't that configurable at all, so it's a wolf in ill-fitting sheep's clothing outside of its core desktop market (hell, even the tablets suck).
I wrote a lot of stuff for the GP2X, which was a handheld, Linux-based games console that ran off AA batteries. That was TWENTY YEARS AGO.
I want a Steam Deck because I want a handheld, Linux-based games console. I don't want Windows anywhere near it. And people will discover that managing this niche and probably doomed-to-be-"unsupported" fad to jump on the bandwagon two years later is more hassle than it's worth.