Interesting! A full-rbf doublespend just got mined by... a miner on P2Pool!

https://mempool.space/tx/9c8a9cc21cc80ff6ee5daffe8f9283b5501e8333e81b3077cdf97b35a3434959

I didn't even know P2Pool still existed. And it kinda doesn't: according to https://web.archive.org/web/20201029044054/http://p2p-usa.xyz:9334/static/ the expected time between blocks right now is 3.2 years. Looks like the last block was 2 years ago.

Seems like the particular P2Pool miner that found the block had a high minimum fee, as the block only contained the high-fee parts of the mempool: https://miningpool.observer/template-and-block/00000000000000000001f6fc9422b5e1babc73f135d4a2ce3550494f54b601ac