Unfortunately this is no good news for solving the lower bits puzzle transactions if I understand correctly:
If ALL unconfirmed transactions in mempool are RBF enabled there will an overbidding fight for lower bit-puzzles even if initial transaction has set "NO RBF".
People will watch the mempool, check for solved puzzle publickey, solve it quickly with pollard kangaroo and create a new transaction with higher fee.
Can someone confirm?
Assuming the extreme worst case scenario of a BRC20 spamstorm and the mempool gets clogged for 48 hours, it's not that big of a deal. Just slap a 200 sat/byte fee on the outgoing transaction and it will be confirmed within minutes, literally.
