Relating to this...recently I needed to hook up a web app to a JSON RPC API and also extend that API, having to work with a legacy system. It was interesting to note that there was only one POST verb used in the entire API and the data format was always the same. At first I grumbled and was annoyed by the use of this system as it was old as hell but after some point, I was like, "oh, i don't have to worry about verbs now" or where to grab from params, query string, headers or body... so it was actually easier. I still hated it though because it wasn't REST because I was pretty biased with the status quo.

What I'm trying to say is having more choices or more ways to do something isn't necessarily a good thing as it makes it easier for people to do it so many ways that they can screw it up or just make it weird for everyone else. REST is kind of weird that way and I agree with this article for the most part.