neowin[.]net/news/microsoft-confirms-black-screens-and-hangs-on-windows-11-preview-pcs-with-older-nvidia-gpus/
I don't know if anyone's running older Nvidia graphics and in enrolled in the Insider Canary channel, but IMHO this is a *potential* compatibility issue to keep an eye out for if your running, or intend to run Win11. The Canary channel builds are *previews* of where Microsoft *may* be headed.