What would you say are the greatest challenges facing modern computing? Protein folding to discover new pharmaceuticals? Sifting the vast quantities of sensor readings from the Large Hadron Collider? Rendering movies so lifelike that human actors are obsolete?

Well if you are Apple, I’d say your greatest challenges were scrolling a document, responding to a mouse click and keeping up with a user typing. Hell, you can’t even manage it for this blog post…