I don't know about STOK grills, but I've had a couple of gassers that have lasted three years, tops. One was a 400-dollar Charbroil Commercial with solid brass burners. The grill body rusted out in three years.
My dad has a Weber Genesis. It is at least ten years old, and sits outside 24/7/365. Yeah, a Genesis will cost about twice as much, but I leaned the hard way that It is cheaper to buy a 600-dollar Weber that lasts ten, fifteen -- maybe twenty years, than to buy a 300-dollar grill every three years.
Just my two cents.