Polygon patches DoS and validator risks in hard forks

The quiet patching before disclosure suggests Polygon prioritized network integrity over public optics, a move that limits exploit windows but raises questions about how such flaws were initially missed. Validator resource exhaustion and DoS vectors strike at the chain's liveness backbone, so the fix matters more for operational confidence than price action. The open question is whether similar latent risks exist in other Layer-2 frameworks, which could prompt broader security audits across the ecosystem.