“Funkytown” is actually regarded as the last “disco” song to reach #1.
I put it in quotes because, as many have pointed out, disco never really “died” after that.
Indeed, we did have a few resurgences of very disco songs especially in the ‘80s.
Donna Summer arose again a bit, although her biggest hit “She Works Hard for the Money” I only regard as partially disco. Her other hit “This Time I Know It’s for Real” actually seemed more disco.
But then, by that time Rick Astley had come up and his hits were definitely disco, so maybe Summer’s connections weren’t as afraid of it as in the earlier ‘80s.
I thought FT was techno pop