Exactly. e.g. it might be much easier (for some) to come up with a finished product/Game with Unity, with mouse clicking here and there... But it takes away all

Exactly. e.g. it might be much easier (for some) to come up with a finished product/Game with Unity, with mouse clicking here and there... But it takes away all the fun of game development. On the other hand, I'm pretty sure it is hell a lot of fun working on Unity itself... So all the sweet is for their in-house devs :) (Same goes for Rails, Node, .NET, etc...)