The original sin is even farther back than the dilution of the Macintosh metaphor. The original sin lies in the difference between the small talk environments, the small talk GUI environments of Xerox Park and the Macintosh version. With each passing year until, as you say, with Android and iOS, they've worked really hard to pretend that files don't even exist. And of course they do. You can't get away from it and the underlying OS's have it,. which is why you have to eventually introduce the files.