I'm not convinced the shift you're describing as far as UX writing is anywhere near as concerning as the actual war on general computing with respect to running the OS you want, the software you want, with restrictions as necessary for security but not for vendor lock-in.
Windows has a variety of tools that let you see debug message and trace events but they're not really useful for casual perusal. I don't know what the ecosystem looks like on Linux.
I suppose I'm not sure what I'm asking for. But in the aforementioned example (Window's post update/install OOBE with "We are just finishing some things for you") it would be nice to press something like Shift+F11 and open up a log viewer that knows you're interested in the main thing on screen to see what it's actually doing.
Windows has no such equivalent; event viewer is incredibly clunky