Since I work with jewelry a lot, stuff like caustics and dispersion are really essential to me.
Faking the dispersion effect would be enough for me, but not having it at all is really a dealbreaker.
I have seen some visuals which appear to use RTX raytraced caustics in a way which added dispersion to translucent objects like glass.
But I was only able to find extremely limited resources on this. If anyone knows more, please let me know.