The classic graphical user interface was well suited to an early Macintosh with 128kB of RAM that ran a few applications and about 50 files, “but it doesn’t scale”, says usability design specialist Don Norman. With those few tasks the GUI was a boon. “You didn’t have to remember anything, because you could see everything. Now making everything visible doesn’t work. The space gets too crowded.” As a logical consequence of this, the all-purpose computer should become obsolete, he says.