A nostalgic band is the one that with no new albums in awhile, survive doing "reunion tours", and playing in less and less capacity venues. Those going from stadiums to amphitheaters, to festivals, to big city fairs, to county fairs.

Bon Jovi with bigger or less record sales, still fill huge stadiums and are far from being nostalgic, no matter if those going prefer the classic hits to newer stuff. JMO