It kindof starts to snag in the GCN/PS2 era. Smash Bros Melee never gets to an adequate point for me, and Soul calibur 2 usually is fuzzy with slowdown on the windmill-esque level.

I don't think I was able to get soul calibur 3 to work too well. The dreamcast version of PSO is much smoother than the GCN version, though GCN version is generally good enough.

Dreamcast/N64/Playstation era I'd say is the sweet spot where games aren't going to have many issues that they wouldn't have elsewhere.