When SU10 came out - started to experienced severe stuttering in VR with directx 11, and found in this forum the cure to it - stopping the holographicshell manually until I found out inadvertenly that Nvidia driver 526.47 (27/10) fixed the problem
Same problem reappeared with SU11 - this time with both Directx11 and 12. Stopping the holographicshell manually eliminates completely the stuttering, even with ULTRA settings in VR.
RTX3080 - drivers 526.86 (10/Nov) .
Hope that next Nvidia drivers will fix the problem , until then I recommend stopping the Holographicshell before starting MSFS in VR & HP G2.