Base abandons OP Stack, keeps sequencer revenue — Superchain economics called into question as OP tumbles

Base will move off the OP Stack to a consolidated "base/base" stack to speed development and reduce complexity; node operators must migrate to the Base client ahead of future hard forks. Base will retain sequencer revenue that previously flowed to Optimism under their licensing agreement, increasing Base’s independence. The announcement coincided with a ~23% drop in OP over 24 hours (≈53% down month-to-date) and contributed to broader altcoin weakness and low alt-season odds in prediction markets (~9% before April).
AI Analysis
The story reports concrete, negative changes for Optimism: Base is leaving the OP Stack and will keep sequencer revenue that had flowed to Optimism, and node operators must migrate to a new Base client. The announcement coincided with a sharp OP price drop (~23% in 24h, ~53% monthly), indicating immediate market selling pressure. These facts support a bearish sentiment and material near-term market impact for OP.