I saw your post on patreon. You mentioned that DAZ3D does not work with the 50 series yet. As far as I know Nvidia is investing a lot into AI generated frames and upscaling to increase the framerate (i think its called DLSS), but the actual compute power of the cards did not increase as much. They just might be reaching their limit of what they can physically do. I dont know if DLSS helps with using DAZ, but I doubt it. You might be better of with a 40 series.
DLSS and AI doesn't help improve the performance of rendering of Iray images in DAZ3D. There are two things that are important for 3D rendering on a graphics card:
1) The amount of VRAM (how many assets you can fit into one scene)
2) The number of CUDA cores the graphics card has (speeds up how many rendering iterations Iray can do per second)
In benchmarking, a 4080 Super with 10240 CUDA cores is about 30% faster at Iray rendering than my current 4070 Super with 7168 CUDA cores. So an image that would take 2:10 to render on a 4070 Super would take only 1:32 on a 4080 Super (on a 4090 with 16384 CUDA cores, the same image takes 1:09).
I do think that when the 50 series NVidia cards are compatible with DAZ3D, upgrading from a 4070 Super to a card with a higher CUDA core count and more VRAM (I only have 12GB at the moment) would be advantageous. Given how bad the current 50 series uplift is compared to the older 40 series, the sweet spot between value and performance is probably going to be a 5080 Super or a 5070 Ti Super (when they are finally released).
The 5090 or 4090 series cards would be great to have, but just way too expensive for what you get back. These days, a 90 series card can cost more than every other PC part combined in your rig. That's insane. NVidia have jumped hard onto the AI bandwagon and PC enthusiasts wanting a good GPU are the ones that are paying the price (literally).