And BIP 110 allows those use cases. New output scriptPubKeys exceeding 34 bytes are invalid, unless the first opcode is OP_RETURN, in which case up to 83 bytes are valid. OP_PUSHDATA* payloads and witness stack elements exceeding 256 bytes are invalid, except for the redeemScript push in BIP16 scriptSigs. Spending undefined witness (or Tapleaf) versions (ie, not Witness v0/BIP 141, Taproot/BIP 341, or P2A) is invalid. (Creating outputs with undefined witness versions is still valid.) Witness stacks with a Taproot annex are invalid. Taproot control blocks larger than 257 bytes (a merkle tree with 128 script leaves) are invalid. Tapscripts including OP_SUCCESS* opcodes anywhere (even unexecuted) are invalid. Tapscripts executing the OP_IF or OP_NOTIF instruction (regardless of result) are invalid. https://github.com/bitcoin/bips/blob/master/bip-0110.medi…