Those faucets that allow you to control three things (amount of water, amount of hot water, amount of cold water) using a single joint (random picture from imgur https://m.imgur.com/G3Yydd9 ). People use taps/faucets with 2 knobs in 2021??? Wtf.

European style windows ( https://www.reddit.com/r/videos/comments/4kjsnp/european_win... )

Excel (before latest reskin which made it less productive because there is less space for user)

Pivot tables

I could probably list few mobile phones. Each were good for their time (nokia 3310, nokia e52, samsung galaxy s2).

Nintendo entertainment system (put the game and play...).