Best thing about pods is that they don't take up too much room in the land fill.
Technically, they may (with some pod designs) improve breathing if you are pushing the RPM above Red line, as that was outside the original engineering formula for the stock induction. They make absolutely no performance difference at mid range and below throttle settings (assuming a proper carb readjustment for their vacuum changing characteristics.)
As for asthetics and the "look", lots of people think plastic covered bikes "look" better. Based on sales figures, more people buy those than pods. So, pod lovers are a minority no matter how you look at it.
They say misery loves company. I theorize, that is a major impetus for continued pod sales.
In the end, pods are fine as long as they are on YOUR bike and not mine. I kinda think they give a street bike an amature-ish look about them. I haven't seen a pod yet that had any internal aerodynamic engineering incorporated. And this just says "unpredictable turbulence" for the buyer to deal with, to me.
Oh, and by the way. I don't like pods.
Just remember... You asked!!!