Apple hasn’t failed at all. They have the number 1 selling phone in the world. There’s no reason to add stylus support for an extremely niche market. The Note barely sells as is and you expect Apple to try to replicate? I certainly wouldn’t mind if they added support, but I don’t blame them for not wasting their time. They know what they’re doing. As others have said though, that’s where the free market comes in. Go buy what you want from a product.