It's actually interesting to look at reviews of disco music on RateYourMusic going past the last decade. You might notice a pattern of the older reviews criticizing it as vapid and cheesy, while the newer reviews praise it as danceable and fun.

I think we're finally brushing off the excessive dismissal of the form, probably in no small part to the rock-worshipping generations being drowned out by the newer generations that have no such allegiances.