Provide an Example of a DeFi Composability Failure (E.g. the 2020 MakerDAO Black Thursday).
On Black Thursday (March 12, 2020), a massive ETH price crash combined with network congestion prevented liquidators from bidding on collateralized debt positions (CDPs) in MakerDAO. This led to collateral being liquidated for $0, causing the protocol to be under-collateralized and nearly fail, demonstrating how a single market event can cascade across interconnected DeFi primitives.