4090 on a 5800x, 32go DDR 4 with a Quest 2.
Playing in VR is definitely a whole new experience. I can play at 45fps (90Hz ASW ON) with -19% headroom with all graphics settings set to Ultra. With DLSS set to Quality, I can push the supersampling to the max, so above 4K and no more shimmering is a delight for the eyes 
I’ll try pushing the refresh rate to 90Hz and 120Hz which is the only thing that’s not maxed out at this point.
A game changer in my opinion (DLSS plays a big role in this as well obviously), no more stutter, even with an airliner at a big airport, everything’s butter smooth absolutely everywhere.