Yeah, otherwise you might need another 1:37 when the glass pops the second tube.

I have a Sunlite minipump. I used it once in the field and it was terrible. That's when cartridges started to look attractive. The other thing is that I have 5 bikes I ride with regularity; the minipump I have installs with a bracket on water bottle cage braze-ons, and it's a pain to move it from one bike to another. Stuffing cartridges into a saddle bag is a lot easier for me (espeically since I keep a kit of a couple cartridges, a couple tire levers, and the nozzle in a ziploc bag). Also, I have Schwalbe Marathons on the bikes I ride most so flatting due to glass, etc., is greatly reduced.