Ethereum rollups at Stage 0 are fully controlled by a security council, with proof systems considered advisory only

Quotes that support claims

Stage 0: Full control by a security council. Proof systems exist but are advisory.

Stage 0: security council has full control. There may be a proof system (optimistic or ZK) running, but a security council can overturn it with a simple majority vote. Hence, the proof system is "advisory only".