Gone through multiple scenes with RT on Vs off on a 3080 and I can't tell the difference other than the framerate halving. In some specific area like the water it's noticeable but I don't think they needed RT for that, they just slacked on the non RT water. Half life 2 has better water than cp2077 non RT.
However I can see a difference with DLSS on (more blurry, less sharp textures, fuzziness on fine thin objects), so it's DLSS off and RT off for me![]()
You could ditch the RT lighting and shadows and keep the reflections on for a decent boost in FPS