I went quite immediately to windows 10 enterprise as soon as I could, main reason was that computer came bundled with win 8.1, which I don't like...
One really important difference between windows 10 and earlier versions is that you now really only do have one client platform covering all platforms from Raspberry pi to any computer and also hololens... if it's better, more stable... probably not, but it's more an advantage to Microsoft than to the users probably. I'm not really sure if you get that extra... Microsoft by the way do have a platform now where they can roll out releases much more quickly.
Whenever you do an app you actually just request what features are available on the h/w platform you run, from phone capabilities, touchscreen, multi touch, to gps, gyro, motion sensors or other sensors that you may have in hololens, and app can / may adjust accordingly
One thing that you should be aware of is that one you go to Windows 10, the new releases that come out will be forced upon you and you don't have a choice whether to upgrade or not. You can delay to a certain point in time but not for long. This also means that there may be room for compatibility issues with applications and platforms that for some reason may be compatible with whatever new version that comes.
So once you're on the win10 bandwagon, you will follow it, there are no users in the world anymore that runs the version of windows 10 that was released last summer, unless they've been in a cave without Internet access.
I'm having quite a lot of issues though with display drivers more or less permanently crashing, it comes from the fact that the new Dell xps 15 uses usb for driving the display, whenewer you use external monitors. This is not a win10 issue but a trouble with the Dell provided driver. It's just not good enough.
Onde particularly annoying feature is that whenever I hook up two monitors, it
always sees the right one as the main monitor, and I have to change that...every day... I want the left to be the main...
Having a full 4K resolution on the laptop and something like 2560x1440 external monitors is a recipe for permanent annoyance as whenever you hook/unhook external monitor you need to do a lot of rescale settings, in fact so many that it's quicker and much easier to do a reboot... yes: every time I hook/unhook external monitor I have to reboot or the scaling will be wrong on the 4K internal display, some artifacts so small that you just cannot see them... or it will be way too big on the 2560x1440 external monitors. Maybe this would improve if I got two 4k external monitors but I'm just not getting that... So Microsoft still have quite a lot of work to do I reckon...
I installed iCloud with made outlook 2016 corrupt and there is a problem now with some core system files... probably not a Microsoft problem, but maybe something really bad with iCloud for windows, had to do lots of reinstalling and it's more or less ok, but not quite...
System file checker reports errors, but is unable to fix them, goodonya
Win10 is good, but the total package is not there yet... many of those things stated above would probably not be any better with win 8 or 8.1 ... but honestly, I expect these things not to be there in the year 2016...
I think it's really many good things about win10 though with the unified windows platform and universal programming platform that makes it possible for developers to create one app that covers all Microsoft client platforms, so in the long run we as consumers will probably be better off...
Although the unified windows platform is not really unified, it's NOT..... the server guys are not involved in the UWP, so they're kind of blowing their own horn, so unified windows platform apps is not going to work on windows server... so long for a unified windows platform
I was using linux until recently (elementary os), but had to go to windows because of strategy with where I'm working... many of the stability issues you just don't have with any linux distro but there are some other issues though, there seem to be no free lunches...
However, I'm more confident in Mr Torvalds than Mr. Nadella
But I'm thinking of getting a mac instead now...