Blazor .NET brings the appeal of building interactive web UIs using C#, but it isn’t always the best fit. Its ecosystem is still maturing, meaning there are fewer third-party libraries and community resources available. Performance can also be a concern — especially with large initial download sizes for WebAssembly. Browser compatibility is limited, and teams may struggle without strong JavaScript skills. Furthermore, evolving Blazor APIs can introduce breaking changes, making long-term maintainability risky. Before committing, weigh these downsides carefully against your project’s goals.