Lots have family there.

And if it wasn't for the current events and recent history, it'd be a nice place. They were fairly modern before the Revolution back in the 70's, and life in Tehran wasn't too bad before some of the warring. At least this is my impression from immigrants I've talked to (Including one woman, who was a lawyer before leaving to study).

This is one of those places with a very rich cultural history that extends back into ancient times, after all.

There are more things in heaven and Earth, Horatio, than are dreamt of in your philosophy

Visit family?

What an ignorant statement! I personally wouldn't want to go to Iran, but I know several techies who have family or business interest there.