Bitcoin developer Jimmy Song has publicly criticized Bitcoin Core developers for their decision to remove the OP_Return size limit, labeling the move as a 'fiat mentality.' This change has ignited debate within the cryptocurrency community, with some operators shifting towards Bitcoin Knots, an alternative node implementation, in protest of the core team's direction. While no immediate financial impact has been noted, the decision has raised concerns about long-term governance and the potential for network splits, reminiscent of past block size disputes.