@tr4verse23
Scalability is the key to mass adoption. Layer‑2 rollups (optimistic or zk) boost throughput with low fees, but rely on external chains. Sharding splits the network, promising 10‑fold capacity, yet adds complexity. Sidechains give speed and flexibility, but trade security for speed. Each solution balances cost, speed, decentralization, and trust. Choose the right trade‑off for your use‑case.