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Carrying forward the success of scalability-focused layer-2 solutions, Ethereum co-founder Vitalik Buterin shared his vision for layer-3 protocols. He stated:
“A three-layer scaling architecture that consists of stacking the same scaling scheme on top of itself generally does not work well. Rollups on top of rollups, where the two layers of rollups use the same technology, certainly do not.”
One of the use cases for layer-3 protocols, according to Buterin, is “customized functionality” — aimed at privacy-based applications which would utilize zk proofs to submit privacy-preserving transactions to layer 2.
