Same problem here. Thought I had it resolved a few months back when I changed the global preferred GPU to RTX 4070, but now the jittery viewport is back in full force. Tried updating drivers and Rhino, but no change.
I’ve tried different combinations of screen resolution and scaling. Only scaling seems to matter. 125% or lower gets rid of the jittering, but on this screen that is too small and I would like to keep the native screen resolution.
I hope the devs are working on a solution.