Any US outdoor track that also runs 1/8th buggy, IMO it would be the car to have. I wouldn't be shocked if somewhere down the road the XX4 was re-re-released with green belts, solid chassis optimized for LiPos and some minor updates to materials. It was and still is THAT good of a car.
Having said that, I'm sure that there are still a lot of people around the world who would pay top dollar for a new in the box kit—"vintage" or not.