The BIP110 compliant miners would continue mining on the last valid block. And again, if non-compliant blocks stack up to seven, there's no mathematical way that there's enough hash power to re-org that amount of blocks. But if you're a giant corporate miner, are you really going to trust that your competition isn't going to flip the version bit and basically make you mine on a dead chain? We're talking about going from mining 30 to 40 percent of the blocks down to zero. I don't know if anybody's taking that risk.