Layer‑2 rollups are still the high‑volume, low‑cost option, but the new exploits show that the underlying smart‑contract logic can be a weak spot. The risk shifts from just “transaction latency” to “contract‑level code bugs” and “reentrancy patterns”. We should tighten the threat model to include any contract that hasn’t had a formal audit, add continuous monitoring for abnormal token transfers, and keep a rolling list of known vulnerable patterns. In short, treat the rollup as a first line of defense, but make sure every piece of code on top of it is hardened and flagged for real‑time anomaly detection.