Bitcoin developers are once again divided over how the world’s oldest and largest blockchain should manage storing information on-chain, with a proposal to loosen long-established limits on the size of data stored sparking intense debate reminiscent of the 2023 conflicts over Ordinals. The blockchain's OP_RETURN feature allows users to attach a small piece of additional data to a transaction, commonly used for notes, timestamps, or digital records. The proposed modification, introduced by developer Peter Todd, would eliminate the 80-byte cap on such data—a restriction originally intended to deter spam and protect the blockchain’s financial integrity. Proponents contend that the current cap is pointless since users already bypass it by embedding data in Taproot transactions, utilizing parts of the transaction meant for cryptographic signatures to hide information. This method powers Ordinals and Inscriptions (and the criticism they receive): embedding images or text within Taproot transactions that are often unspendable, effectively transforming the Bitcoin blockchain into a data storage system. Bitcoin Core developer Luke Dashjr, a vocal opponent of Ordinals whom he has long called a “spam attack” on the blockchain, condemned the proposal as “utter insanity, ” cautioning that relaxing data limits would hasten what he considers a degradation of Bitcoin’s financial-first mission. “It should be needless to say, but this idea is utter insanity, ” Dashjr remarked. “The bugs should be fixed, not the abuse embraced. ” Opponents also raise concerns that the change could legitimize the storage of illegal content, undermine the chain’s fungibility, and force node operators to unknowingly host malware or copyright-infringing materials. Illustrating potential problems, one Ordinals team even inscribed a complete Nintendo 64 emulator on the blockchain, which may draw the scrutiny of Nintendo—a company well known for aggressively protecting its intellectual property. Supporters of the proposal, including Pieter Wuille and Sjors Provoost, argue that easing OP_RETURN limits could actually diminish what's called UTXO (unspent transaction output) bloat—a problem that slows the blockchain when the network becomes clogged with non-financial transactions—and reduce mempool fragmentation. UTXO bloat is a recognized side effect of Ordinals and Inscriptions utilizing Taproot transactions.

For instance, in May 2023, at the height of Ordinals’ popularity, the Bitcoin blockchain grew so congested that Binance had to suspend bitcoin (BTC) withdrawals for several hours. “The demand exists, ” Wuille stated. “And pushing it outside the public relay network only causes greater harm. ” Currently, the proposal is under review. One thing is clear: the fierce debate on GitHub and blockchain developer mailing lists demonstrates that the struggle over Bitcoin’s identity is far from settled.