rollup – David Barreto

tl;dr

Vendor lock-in: difficulty moving away from StarkWare’s ecosystem

System centralization: the Sequencer and the Prover are operated by StarkWare

Steep learning curve: Cairo is hard to learn and the documentation has gaps

Upgradable smart contracts: StarkWare can make changes at any time

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tl;dr;

A smart contract blockchain can scale with hardware, with an optimistic rollup or a zk-rollup
Solana’s hardware scaling solution suffers from lack of decentralization and sync issues
Optimistic rollups (Optimism) rely on off-chain verifiers and has a 6 days finality on L1
zk-rollups (StarkNet) submits and verifies validity proofs on-chain increasing security but also data usage of L1
Optimistic rollups are cheaper but zk-rollups are more secure