@dale
Similiar thing happens to me: I was participatimg to the discussion in a topic about it some days ago. Here it is…
Lag when selecting multiple objects Rhino 8 WIP
After some work (in my case it is sufficient half an hour) Rhino becomes really slow in responding to multiple selections and zooming/panning views, even in wireframe.
It happens on three totally different machines in my studio, all of them Windows 10 or 11, all of them with updated video drivers: it was suggested to me to update to see if the problem was persisting with new drivers and yes, it does persists.
Hope it can be solved as it makes Rhino 8 really unusable.
:: Gian