All other things being equal, which is better if you need to place a 64-bytes into the Bitcoin blockchain? A traditional OP_RETURN or a spent taproot transaction such as:

OP_FALSE

OP_IF

OP_PUSH my64bytes

OP_ENDIF

I know that the anti-OP_RETURN folk would say “neither.” But if there was no other choice for a particular protocol, such as a timestamp or a commitment, which is better? Or is there a safer place to put 64 bytes that is more uncensorable but also does not clog UTXO space, only spent transaction `-txindex` space?

My best guess was that the taproot method is better, but I suspect there might be some who disagree. I'd love to hear all sides.

-- Christopher Allen