I have two NVME disks in my PC, so I installed Win11 and kept Win10 on the side. I must say that I'm pleasantly surprised. Haven't tried ED yet, but Project Cars 2 (in VR) runs just fine. Also, I get the same performance (or slightly better) in Cinebench R23. I also haven't had time to run Time Spy yet. Mixed reality was a mess at launch day, but I got it to work now.
Regarding Win11, it's annoying (as usual) that M$ tries to force your hand with M$ accounts and Edge, but I'm running a local account and Chrome now. It seems that all the quirks are fixable after reading a little on Reddit etc. The new UI is great (with a few hiccups), but there is no reason to switch from Win10 as things are now. I was just curious and I haven't burnt my fingers (yet). In the long run I think I'm gonna like the new UI, but as some have said, it seems that Win11 is half baked. Not EDO raw alpha style. Just not quite finished in the details.
Edit
Actually, this is interesting.
My system has an AMD CPU with an nVidea GPU. Is anyone running Win11 with this combo?
Are Intel based systems more adept with Win11?
I have a Ryzen 3950x and a RTX 3070, and I haven't noticed any performance issues so far.