FEAT: Adding a Conclusion part, so that the user can have a better experience of the summarized content.

The provided text is detailed and comprehensive, covering various aspects of gRPC-Web, including its background, mechanics, and advantages over REST and WebSockets. The content is well-structured and provides practical code examples for better understanding.

However, something that could ignite and give light to the blog could be "An addition of a CONCLUSION Part", so that the reader could get a better overview of the content.

Consider summarizing the key points discussed in the document and rehearse the potential of gRPC-Web in modern web application development.
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Revised: "Conclusion:
This article has provided a comprehensive overview of gRPC-Web, highlighting its advantages over REST and WebSockets. While further work is needed to incorporate error handling and performance benchmarking, gRPC and gRPC-Web present promising alternatives for modern web application development. The technical aspects of gRPC and gRPC-Web, using Envoy, can potentially replace REST and WebSockets in the evolving landscape of web development."

These suggestions aim to enhance the overall readability and clarity of the content.