base58btc on Nostr: the most recently 'removed' opcode is OP_CHECKMULTISIG; it's available in pre-segwit ...

the most recently 'removed' opcode is OP_CHECKMULTISIG; it's available in pre-segwit and segwit v0 scripts.

it's not available for segwit v1 scripts (aka taproot scripts or tapscript)