My only MAIN issue with framegen, and I am saying going from a base of like 50fps, Maybe 40 to 45 at a push, is that how it fucks up static 2d prompts. Like if a button prompt is on the screen and it's hovering over an NPC, it kinda stutters and looks shite.
I've not seen if 4.5 improves that?
Outside of that I can deffo spot some odd artifacts now and again but I can live with them as I find them minimal tbh. For me, the feeling of fluidity does improve the experience overall and it allows me to play Crimson Desert with ray reconstruction, which looks like the craziest shit I've seen in my life.
Worth it.