Re: The sad thing is that Windows 10 is great and adoption would have been higher...
Windows 10 is much better than Windows 8 and 8.1, and is much faster than Windows 7 on multi-core machines.
Yes, it's very much faster. Especially on the machine I had dedicated to watching television. Without that pesky Windows Media Centre hogging all those cpu cycles, the computer is very definitely fasterer. It doesn't do very much other than be fast, but if that's what floats your boat, why don't you try compiling your own Linux kernel with Gentoo? That's free too.
Speed's not so important to me though, so I'll stick with Mint and just watch a bit of TV and listen to some music :-)