Choice.

From a September 2011 post on THP ...

In my personal experience, the idea of multi-tasking is one that invariably leads to the increased potential for confusion and a spreading-too-thin of conceptual awareness. The obsessive need for keeping 15 plates spinning just because it is a "skill" that we have decided is required in order to "compete" (?) is utter madness. Given the choice between a Blackberry and iPhone, I'll take a rowboat every time.

The alternative scares the crap out of me.