Personal experience : Windows becomes sluggish over time (XP, 7, 8, 10 tried all of them). There could be myriad of reasons e.g. "smart" services, too many programs in autostart. I've been a power user and try to disable such things pro-actively but it's not comparable to a fresh install. Whereas with Ubuntu, it says near fresh even after years of use. Again, this is personal experience. YMMV.

So, I cannot imagine using Windows as my primary machine. Not sure about Mac, hopefully it's good. Linux is fine so far as my primary desktop / server.

That said, this news is quite exciting for both corporate & personal machines and I hope to see it progress.