ok so go get a ruler and put your thumb on 150mm and you will see that 150mm is really not that fat, and the only ski made at 150mm is pollards personal ski. so now move that back 20mm to 130mm and you will still see that its not that fat if you really think about it.
i know i was a fictim of this at first and i was imagining it would be like a foot wide and your stance would have to be like double your shoulder width. but in reality the fattness of skis really isnt that fat
just my 2 cents