There might be a good reason for this. Raster effects were already really good in newer games, and ray tracing could only improve on that high bar. It’s filling in details that are barely noticeable, but creap ever so slightly closer to photorealism.
Old games start from a low bar, so ray tracing has dramatic improvement.
I think the tech industry misses the good old days when the upgrade was noticable and exciting. Now it’s just this big media blitz and the upgrades are not that noticeable. Lol, nothin like watching a 30 minute video that they flip back and forth with. “Oh, I can see the difference”