Really nicely putWindows 8.1 is called Windows 6.3 under the hood.
So you really have a stupidly advanced and fast OS, probably more stable than most linux desktops (where you can still get bitten by some bad driver or weird stuff)
Metro is just the new flavor of turd that tries to ruin it, we used to have Real Player, then it was Adobe Reader that grew at a geometric rate, then you have some people forced to install Itunes (which forces installing Quicktime too and vice versa). Eventually some other silly piece of software will be written just so we can hate it.
Not all change is bad though, as a mild thing we don't have to click on Winrar warnings that the version is unregistered ; we don't have to upgrade codecs, which was a more serious and annoying thing (now you just need flash player and vlc, that's all)
Indeed that OS is both a marvel of technology and schizophrenic. I'm ok (mostly) with it now though it took me time and a couples of shortcuts on my desktop. Overall in practice it is still not as convenient as the old windows (start menu) used to be.
Now among the dumb thing MSFT is doing, they split they user base asking devs to develop Metro apps in the mean time it seems the option of creating a hub, an appstore in modern parlance, for the old, native X86 applications did not crossed their mind... It is baffling
Why? I don't know. I never really thought of that option (which is available somehow in the linux/free world) I did a couples of days ago and I've yet to find an answer for that obvious lacking.
There is a (mega) tons of X86 software out there and MSFT has not think about a way to properly present (and leverage they could make some money on sales) the costumers with all the option windows environment offers.