Why though? On Mac, I have tons of unsaved work: many TextEdit windows which keep their state for many months, even through reboots. And it has been working like for at least 10 years. It's such a simple, little quality-of-life thing. And Microsoft just doesn't care.
This is what a computer should be doing: helping the user to get their work done, without the user having to worry about insignificant details about saving files. E.g. does Google Docs ever ask where to save a file before closing the browser or shutting down the computer? No you just get an untitled document that is automatically saved. If I want to rename it or save it in a different location, I am free to do so. But as long as I don't, it doesn't get in the way and just persists stuff automatically.
Ok, I wouldn't do that because I don't know what random apps are doing.
But if you're happy with your workflow, don't mind me.
I don't disagree, but you have to know which applications reliably keep their state across restarts. You can't blindly rely on it on any desktop system. The Microsoft Office applications actually do auto-save documents since a couple of years ago, even though the recovery UX can be a bit awkward.
What Microsoft doesn't care about is that you may have applications running that don't do that, when Windows reboots for updates.