Ray Tracing sucks all over the place, even with the 3090. The only game changer is DLSS.
I'm not sure DLSS is a game changer either. You basically pay by reducing quality for AI upscaling. Not sure the trade-off is worth it. I.e. I'd prefer simply not to lose quality and not upscale anything even if it's going to use lower resolution like 2560x1440.
And it's not free either - DLSS is using tensor ASICs on the die. Having those means you have less room for other GPU compute units.