I think I will survive without Wayland.. I will miss gamescope a bit, but, it is what it is.
Steam UI.. good thing I don't spend much time there.
Proprietary driver, shouldn't be a problem. (seems it is easy to install, at least on NixOS) And I don't run secure boot, so, no issues on that front :D
I have used a GTX1080 for years. There have been minor issues under Wayland but it worked pretty much flawless with Xorg. Just set up the proprietary Nvidia drivers and you're good to go. The only thing to keep in mind is your temps, because the drivers (still) do not support dynamic down-clocking and so you're sitting at the highest clock rate by default.