Here's a little breakdown on this that some of you might find useful:
ManyKeys
OP_RETURN Data Carrier Size Removal: Technical and Legal Risks
Increasing Bitcoin's OP_RETURN data carrier size from 80 bytes up to ~4 MB per block (Bitcoin Core v30) brings new technical and legal risks—especially regarding liability for illicit data—alongside a drive toward network standardization and transparency. This analysis weighs both sides, highlighting the debate between critics warning about centralization pressures and developer advocates focused on protocol realities and censorship resistance.