The Bitcoin community is divided over Bitcoin Core v30’s decision to lift the OP_Return data cap, with growing support for alternative node software Bitcoin Knots.
The upcoming Bitcoin Core 30 upgrade, which removes the 80-byte OP_Return limit for non-monetary data, has sparked criticism from Bitcoin developer Jimmy Song, who calls it a ‘fiat mentality.’ The move has intensified a six-month debate, with opposition citing risks to decentralization and a rise in Bitcoin Knots nodes, which now account for 20% of the network. This dispute draws parallels to the 2015–2017 block size wars that resulted in Bitcoin Cash’s creation.