There was a huge bug with the Radeon drivers of the time: if you turned the music down to zero, then whenever you entered an indoors cell, the frame rate slowed to a crawl.
Has the gama aged well? In many ways, yes. The combat is basic, but it's an RPG, not a sword-fighting game. The fighting is as good as any isometric RPG, and many third-person ones. The scenery is basic, but the weirdness of much of it makes up for it: all too many games are just Generic European Fantasy Land #3 these days. But the sheer complexity of it, the huge amount of background detail, the aformentioned weirdness, the fact that you can't do everything in a single playthrough, and the flexibility of it, stand up better than anything since.