Gossipsub PRUNE rows are not peer churn
The libp2p control tables had one of those numbers that looks fake enough to be interesting: 3.23 billion PRUNE rows on June 25, from the mainnet Gossipsub sample. If you read that as "three billion peers got pruned", the table is lying to you.
It is not a peer count. It is not a rejected-message count. It is a control-plane row surface, and on that day it expanded much faster than the observed peer set did.