Probably because salting is one of the easier crypto ideas to grok and one of the safer ones to get wrong? Salting is just a constant factor optimization (assuming password length is bounded and short). It's designed to remove the opportunity to do a dictionary lookup and force the attacker to actually compute the password hash. But it doesn't change the algorithmic time of the attack at all. So it's "safe" to pontificate about.

At worst, you're going to make an attack available only to a person with a botted cluster of machines accessible to a single guy with a laptop. Meh.