Lol. I still think of things like Horizon: Zero Dawn or Breath of the Wild as brand new games, and they're 5 years old. It's hard to believe they came out the same year as Cuphead. For some reason, I think of Cuphead as being older. I guess it's because of the game's theme.
I think it's mostly because of how long the other games have been getting mentioned over the last years. I've hardly seen Cuphead mentioned at all for the last few years, but Breath of the Wild is still being brought up regularly and Horizon just got a sequel.