[agumonkey]

I do think our brain as a somehow fix structure / existential path that would struggle to make sense over multiple centuries[0]. Beside reminiscing times gone, there's also the absurdity of cycles and "forgettance", where stupid things come over and over[1], which is not pleasant.

[0] if you don't just go insane because your memory capacity is reached and you just can't organize new ideas without losing others or causing damage.

[1] that said this might be due to equal demographic waves, but in the case of immortal population, young ones would be less and less large % wise.