Every time someone voluntarily went to a Windows 10 PC (even though there are alternatives), they have a horror story about it
Hyperbole = bollocks. My partner and I are on W10, it's heaps better than W7 or W8*, and we have no horror stories. Almost everything I use auto-saves, apps reload on reboot, and I have enough discipline to save Notepad files or Sql Manager queries if I want to keep them.
First of all, you're still making my case, as you imply that Win 10 reboots outside of your control. Beside that, a lot of people cannot save their work fast enough to be safe in such rebootey conditions - my SolidWorks assemblies easily take half a minute to save, sometimes much more (rarely, but it happens).