Not a great loss so far as I'm concerned. My experience is much like StorminMatt. The colors and contrast are pretty bad. When I want slides, I just take slides. Prints from slides are a better compromise, in my opinion.
I would suppose the market for slides from neg. film is pretty small these days. The print media doesn't use them any more, and how many families sit down in the evening with the slide projector and popcorn to enjoy the vacation photos? You know, I really miss that. When my wife and I were kids, our parents did that nearly every weekend.