MetaMask excels at multi-chain accessibility and developer familiarity, establishing itself as the de facto standard for EVM-based development. Its massive install base of over 30 million monthly active users and deep integration with tools like Hardhat, Foundry, and Infura creates a robust, low-friction environment for builders. For example, its window.ethereum provider is the cornerstone of countless dApps on Ethereum, Polygon, and Arbitrum, offering unparalleled network coverage.