Sam Rosenthal interviews Tapbots’ Mark Jardine. The interview isn’t too long and it’s a good read.
Allow me to quote a single answer by Jardine, in which he talks about the reaction of some people to iOS 7:
I think a fair analogy is when photography started to go digital. There were the early adopters that embraced DSLR’s and the use of Photoshop for post. And then there were the film guys who refused to move on. In many ways, film was still better than digital, but we knew where the future of the industry was headed. And a lot of die hard film guys got left behind. iOS 7 is a reboot and it will get better over time. I’m learning and embracing the design language now so our future apps can be better because of it.