Nothing has happened to Dalmatians if you pick a very good breeder and ask for their references. We are owners of our third Dalmatian and he is 15 years old, and looks like he is 6 or 7 years old.
What happened to Dalmatians for a period of time was that with the popularity of Disney's movie 101 Dalmatians, breeders were putting them out to guickly, and as a result breeding practices suffered. Our second had papers, but I never checked for references. He died at 5 years of age. His internal organs basically stopped all about the same time.
Michigan State University vet school did a study on him after he died, and as a result several brreders in that area changed their practices. Poor breeding will stop any breed if bad enough.