iOS is by far the best mobile platform out there, in terms of its development environment. The problem is that everyone is using the crippled version of it.

Cydia/Theos/Cycript were developed by two people and they come together so much better than that shitty Xcode stack it blows my mind. They are so good that iOS being closed source isn't even a con anymore. They are probably the most underrated tools in existence; most people haven't heard of them (let alone regularly use them) because the industry doesn't see un-jailed iOS as an lucrative market. It's a damn shame.