That is fine for things that serve an obvious function. If you need a checkbox, use a checkbox, it doesn't need improving. If, on the other hand, you create a n

That is fine for things that serve an obvious function. If you need a checkbox, use a checkbox, it doesn't need improving. If, on the other hand, you create a new type of control/interaction to solve a problem better, great. Also, what iOS did was not a single control but a completely coherent set of controls and interaction that might have lots of people working on it but which all had to pass muster with Steve Jobs before it was approved. I haven't used iOS but have used MacOS and although I would argue that MacOS to me is not a good UI (you have to learn what most things do before you can do them), the consistency is somewhat comforting.