Gavin Andresen supported the proposal, while many developers and users opposed its activation mechanism, growth schedule, or governance implications. XT did not reach its activation threshold, but the dispute intensified into a multi-year debate over scaling and decision-making.
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Bitcoin XT brings the block-size dispute into production software
Mike Hearn released Bitcoin XT with BIP 101 support for a miner-activated increase to Bitcoin’s block-size limit.