The upcoming Bitcoin Core v30 upgrade, set for release in October 2025, has sparked controversy among Bitcoin developers and purists. The upgrade will eliminate the 80-byte limit on OP_RETURN, allowing users to embed arbitrary data in transaction scripts. Proponents argue this change supports a decentralized market for blockspace, while critics fear it might lead to spam and misuse, undermining Bitcoin's identity as a peer-to-peer payment system. Supporters of the alternative Bitcoin Knots client advocate for stricter policies to prevent non-financial data from crowding out transactions. Additionally, the upgrade has raised concerns about Bitcoin Core's independence, with accusations of potential corporate influence. Critics suggest that the changes benefit ventures like the Citrea layer-2 project, while defenders claim the decision-making process is transparent and inclusive. Ultimately, the fate of the OP_RETURN cap will influence how Bitcoin is used and perceived, diving into deeper discussions about Bitcoin's purpose and governance within the community.

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