Me neither but it's probably because DKC came extremely late into the SNES' life (when the PlayStation was out and brought 3D to home) and how 2D platforming slowly became a saturated genre that also suffered from people getting bored of it (that's hypothetical but I'm certain that other genres also made people less interested).
Even Donkey Kong on the Gameboy wasn't as popular because handhelds were seen as inferior consoles compared to home ones, arcade and even computer (as Doom was also out in late '93).
So yeah, they were impressive games for the SNES but 3D came in and made people look at what's coming even if many didn't age as well.