If we ignore the datamining and forced updates, which are two things that most people are actually fine to put up with, Windows 10 is pretty awesome OS.
Smooth, fast, runs all the apps, has premium drivers.
Should have been modded "Insightful +5".
The forced updates will mean that if MS fucks up, they pull the plug on the majority of the world's computing infrastructure. Teehee, guess how thorough those patches will be tested? Pretty thorough is my guess. And since everyone has the same environment, barring drivers and antivirus software, this should take less effort than it used to. So, I don't think more than 1% of the population will care. This could change when MS actually does kill off everyone's installation, but I'm prepared to wait and see on this one.
For most people continuous updates will be a huge improvement because botnets will have a smaller attack surface. If they *do* find a vulnerability it will affect everyone, but it will also very likely be patched rapidly and rolled out right away. Security researchers will find their work easier too: they just have to deal with one version of the OS, and not with all of the subversions.
The datamining is my biggest issue, but I'll just have to find a way to patch the ethernet driver to drop selected packets, if the antivirus tools won't give me an option to block the telemetry from phoning home. I guess we'll see "phoneblockers" popping up this year, or next year at the latest.