I know this is a terrible question. I am trying to figure out what a friend asked me. We were talking about mining ETH and he said:
Back in 2016 2GB cards "stopped working" and that means that if the same thing happens again 8GB cards might be necessary
What could that mean? Was there a difficulty adjustment in 2016 that made a certain class of GPU cards obsolete for mining ETH? Was it part of ice age?