too late to be revolutionary

Does anyone have some kind of cool invention that you came up with that would be cool in theory, but nowadays would just be unnecessary?

Umbrellas for shoes

Genuis

There is literally a whole genre for this is Japan and we learnt about it in Japanese last year but can't remember what it's called

I looked it up and it's called chindogu

well now I want some! look what you did!

yeah there's tons of them
my fave is the baby mop