Did Nature Just Give Us These Mechanisms That Mediate Remembering?

i trained with ericande the luminary, who really described a lot of the mechanisms that mediate mand i use anythig. He's truly my academic father, and we still talk regularly. And so a, it was all in the first 50 years into the science of memory, people like him isolated a group of mechanisms pathways in the cell that n memory. But then what happened in the last ten years or so? Investigators found a completely separate group of mechanisms, or pathways, that are dedicated to forgetting. Which allows one to ask: did nature just give us these mechanisms for no good reason?