Bitcoin’s governance has been under scrutiny since a high-profile attempt to push protocol changes with Bitcoin XT, where a 75% miner approval threshold revealed cracks in consensus mechanisms. Samson Mow, CEO of JAN3, recently reignited this debate by drawing parallels between the failed Bitcoin XT initiative and today's disputes involving Bitcoin Core and Bitcoin Knots.

Bitcoin XT and the Miner-Driven Hard Fork Proposal

Back in 2015, Bitcoin XT's key proposal, BIP101, aimed to increase the block size limit from one megabyte to eight megabytes, with plans to double it regularly, potentially reaching over eight gigabytes by 2036. The proposal required miners signaling support on 75% of 1,000 consecutive blocks, followed by a two-week grace period, to activate the upgrade. Proponents, including Gavin Andresen and Mike Hearn, believed this majority threshold would protect against single mining pools blocking the change. Yet, critics warned that endorsing such a rule without consensus across exchanges, businesses, and full-node operators risked creating network splits. Mow, then with BTCChina, highlighted how Chinese miners' reluctance prevented Bitcoin XT from crossing its activation threshold, showcasing miner power in governance.

Core-Knots Disagreement Revives Governance Concerns

Mow’s recent comments focus on tensions between Bitcoin Core and Bitcoin Knots developers, particularly regarding Core 30.0 and its updated OP_RETURN relay rules. These changes lifted the data-carrier limit to 100,000 bytes and permitted multiple data outputs but allowed operators to revert to previous limits. Unlike Bitcoin XT’s hard fork aiming to alter consensus rules, this dispute centers on relay and mining policies where nodes choose mempool preferences while adhering to the same blockchain. This technical difference marks a distinct governance battle, yet echoes challenges first exposed by Bitcoin XT.

Though Bitcoin XT failed and Bitcoin later adopted Segregated Witness via a soft fork, the resulting community split led to Bitcoin Cash’s creation through a chain split. The renewed spotlight on these governance questions emphasizes how past conflicts continue to influence Bitcoin’s trajectory.

This material is for informational purposes and does not constitute financial advice.