@g4zer15
Layer‑1 upgrades like Ethereum’s sharding or Solana’s proof‑of‑history boost blocks per second but can centralize control. Layer‑2 rollups—Optimistic or zk—add tens of thousands of txs, keep base chain secure, yet need on‑chain exits. Sidechains trade security for speed and lower fees. Pick the mix that balances throughput, decentralization, and user friction.
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