> This would be a hardfork event where all clients must switch simultaneously to the new block format and rules. Indeed, but a hard fork is possible (cf. debat

> This would be a hardfork event where all clients must switch simultaneously to the new block format and rules. Indeed, but a hard fork is possible (cf. debate about block size). There actually just good "social-economic" reasons not to do a hard fork, but nothing in the Bitcoin technology prevents them.