What are the main disadvantages of Xamarin for mobile app development?

Disadvantages of using Xamarin in app development include larger application size, as Xamarin apps often include extra libraries that increase download sizes and storage requirements. Advanced UI or performance-oriented features may require specialised, platform-specific code, reducing code sharing and increasing development time. Xamarin generally offers near-native performance, but performance lags can occur in graphically demanding scenarios compared with native SDKs. The Xamarin development community is smaller than that for native iOS or Android platforms, limiting available libraries and third-party support. Xamarin may also delay support for new platform features on release, posing challenges for projects needing the latest capabilities.