a plausible theory, but i don't buy it.
as much as stern claims to hate his show, you know damn well he loves it. he loves every bit of it. and quitting something isn't exactly a difficult decision to carry out, especially when you've already got the cash, status, and girlfriend that howard does.
he's hated his producer with a variety of intensities, but has kept him around for two decades! (baba booey, baba booey)