This is about the only thing I miss from DH longboarding when switching to snowboarding. The ability to instantly move your stance around when the situations suits it.
I'm 5'7 and I find the wider I go (22" or more), the better my ollies and stability but the more wrecked my legs and knees feel by the EOD - In particular my inner thigh & hip muscles and my rear knee. I'll need to few days to recover. Otherwise I stick to riding 20" (innermost inserts) just like that chart says if I plan to ride more than one day in a row on a given weekend.