Most devices in that class I see run some vendor flavor of Android or ChromeOS and not Windows, so definitionally speaking they do run Linux out of the box.

Yes but it's a bit academic. The problem is that getting a FOSS distro of Linux onto low-end general-purpose computing hardware is harder now than it was a decade ago. I speak from bitter recent experience.

Oh, I know perfectly well what you mean. The move to the SoC paradigm has serious implications for the future of computing freedom. I can't imagine how we might be able to fight this crap, realistically.