Same as you:That's sounds strange, if same issue / same symptom appear regardless which driver you are using. Then most likely it's not really driver related.
I am also using a Nvidia GPU in High Sierra (10.13.2 now) with the latest web driver, flawless experience so far. But I am with the tower desktop Mac Pro, and I am running the 1080Ti. So, the newer hardware may help.
However, since the symptoms is driver independent. And seems did't affect the newer GPU. So I suspect may be it's really Metal 2 related. May I know what do you guys see in this page (about Metal support)?
View attachment 741671
I am now testing in 3840x1080 HiDIP (even though my monitor is a 3840x1080 144Hz monitor. I let the GPU rendering at 7680x2160 144FPS). I can feel that not as smooth as non HiDPI option, but totally acceptable. Will observe if this HiDPI thing is buggy and eat up all VRAM and slow down the whole computer.Same as you:
Far from flawless though. Extremely laggy unless I run it in full (tiny text) resolution.