I'd echo the comment down the line a bit for the pros / cons: https://news.ycombinator.com/item?id=14264977

The other non-obvious thing is it has been easier to introduce people to use, especially newer programmers. Being able to walk through examples in the browser, all on the same endpoint, just makes it a lot easier for sharing the concept of getting data. Though it may speak to the fact that our audience is primarily people seeking data, not trying to perform actions.