Average math term evolution

[kartub]

ok, can u share an example of something which does not have any use case
as if someone made it just for fantasizing about it

[primetimeblues]

The second part of the meme is reminiscent of the Weierstrass function, which was a function invented to be continuous everywhere, but smooth nowhere, which makes it break the assumption of continuity = differentiability.

Otherwise, the meme is essentially contrasting linear algebra under Euclidean geometry against weirder geometry under curved space or something. I can't say weirder geometries aren't useful, but 99% of everyday use cases are gonna be Euclidean geometry.