[Question] Why does “deep abstraction” lose it’s usefulness in the far past and future?

[Garrett Baker]

Yesterday this post mentioned the “unreasonable effectiveness of abstraction” particularly noting

in the far past or the very far future, the state of the universe may be such that deep abstraction would be unlikely to remain useful (and thus “effective”).

This makes no sense to me, and I was wondering if anyone could point me towards an explanation.