Your rollup requires running a node of each of the DA layers. Your fork choice rule becomes really complex, which just explodes the overhead and complexity for very little gain.
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Solana Co-Founder’s Meta Blockchain Proposal Looks To Unify Rival Chains Under One Network
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Celestia COO Nick White criticized Anatoly Yakovenko’s meta blockchain concept by arguing that similar models, referred to as DA multiplexers, have long existed theoretically but are rarely deployed due to high operational complexity.
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