When can we expect ZK rollups to hit the mainstage?

Basically when can we expect a ZK scaling solution for consumes?

From what I understand optimistic rollups (like Arbitrum) require a 1 week holding period so if there are any errors they can be caught but ZK rollups provide instant verification and therefore instant access to low fees.

If anyone on the tech side can correct me please do I am trying to learn more, but if you know any daos, protocols, teams or projects in place at have a roadmap to ZK rollups for consumer use please comment them below.

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Thanks in advance!