Is ICP the cure for Microsoft/CrowdStrike outage?

This would completely depend on the strength of the community and the level of decentralisation and due dilligence that takes place when the community accepts a new update. Greater levels of decentralisation + stronger community voting culture is actively being pushed for in numerous different ways - e.g → Do U C What IC? 👀 IC Proposals that mislead... and a 10,000 ICP Giveaway!