VR 4090 owners , is/was it worth?

Hi, a simple question/tell me your story:

Was it worth getting the 4090 for VR? Did you play PCVR before your 4090 and could compare it? Do you play UEVR? how many FPS do you get? do you achieve 72/90 fps without ASW? If not, how close are the numbers? Would a 5090 with 25-30% performance lift you over 72/90 fps?

I've seen videos of Cp2077 with 25- 35fps (without dlss, but RT(?)) in flat! (4090/5090) so how do you manage to play that in VR?

Is RT / DLSS usable in VR?

actually i own a Q3 and a pc with 12700k & 3080 10GB, I never tried uevr because lol, I can't run alyx,behemoth etc on high/ultra so yeah.

the 5080 has "only" 16GB (i fear i end up in 2 years with to less Vram like now) and reaches 50-65TFlops , so less then the 80Tflops from the 4090.

the con with the 5090 beside the price (bye kidney lol), is id have to rebuild my entire pc, because i only have a 850watt psu, ddr4 etc.

So instead of ~1300€ for the 5080 i have to spend nearly 3.5k 9800x3d+5090... 🤔

is it worth?

thanks