I am increasingly getting irritated with REST for our app. It takes too much thought to figure out the "correct RESTful approach" when building out an API endpoint. And then again, there are no right answers. And all the JSON serialization/de-serialization logic, for every single endpoint. Too. Much. Work.

I'm wondering why Thrift/Proto-buffers aren't popular? Even for browser-based JS clients. What're the pitfalls?