Developers should stop using the old, verbose method for handling HTTP requests with JSON. The modern approach, introduced in .NET 5 with System.Net.Http.Json, offers extension methods that simplify this process significantly. For sending JSON data, methods like PostAsJsonAsync, PutAsJsonAsync, and PatchAsJsonAsync are available. Reading JSON responses is streamlined with ReadFromJsonAsync, and GET requests can even be combined into a single line with GetFromJsonAsync. These methods handle serialization, encoding, and content type automatically, reducing boilerplate code. Cancellation tokens can be passed directly to these methods for managing request timeouts. Custom JSON serialization options can be provided to tailor the serialization process. For enhanced performance and Native AOT compatibility, source generators offer a faster alternative. Error handling and dealing with empty responses are also addressed with improved strategies. A real-world typed client example demonstrates how to integrate these modern methods effectively. Ultimately, adopting System.Net.Http.Json leads to cleaner code, better performance, and built-in cancellation support.