Six of the eight largest Ethereum rollups by value secured still operate a single sequencer under the control of the founding team, according to public documentation and roadmap posts reviewed by this newsroom.
A single sequencer can reorder or delay transactions and, in practice, is a single point of failure for liveness. Every affected team publishes an escape hatch; the hatches vary considerably in how usable they are.
Four teams have revised their published decentralisation timelines at least once. Two declined to give a current target date when asked.
The engineering reasons offered are consistent — shared sequencing adds latency, proof systems are still maturing, and fee revenue models depend on ordering. None of those are secret, but they sit awkwardly beside marketing that describes the systems as decentralised today.
We have published the current documented status of each rollup, with the date we checked it, and will update as teams ship.
