Livingston: Was it hard designing something for non-technical users? Perlman: It's extremely hard, because you have to design for someone who's not you. After a while, as you develop interfaces and have experience with them, you begin to think with the intuition of a person who does not understand the inner workings of the system. And you also have

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To avoid accidental presses and to make the moment more deliberate and meaningful, we went with a long press. The challenge with a long press is always discoverability—How does one know they’re supposed to hold? The answer is to provide instant feedback with an animation that builds anticipation. [...] Another choice we make to improve discoverabil... See more

But while the technology to distribute our ideas has grown in leaps and bounds, the interfaces have remained largely the same.