I think there's a large fanbase because of the intersection of people who grew up with them and the people who were too young to see them live but wished that they could, so yes, people probably do care to an extent, but it's more accurate that people will be interested to hear it so they can try and get tickets

I can't really think of a band that reasonably could get back together which would have a larger pull except for maybe One Direction, but even that's a push when considering the number of people who could be interested in getting tickets