Proposed "step-by-step roadmap for scaling rollups with calldata expansion and sharding" by Vitalik Buterin

Proposed Roadmap

Step 1: tx calldata expansion

Step 2: a few shards

Step 3: N shards, committee-secured

Step 4: data availability sampling (DAS)

Related issues and questions

Optimistic and ZK rollups under sharding

Who would store historical data under sharding?

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Also, there is this recent roadmap visualization.

Source: https://twitter.com/VitalikButerin/status/1466411377107558402

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