There was a few years there where demand really outstripped supply. We were the only place in the world that made the media for Kodak at the time and I'd say 2002-2006ish the kiosks were really doing well and we just couldn't keep up (good or bad Kodak didn't seem able to predict the market for it's products). They added on and doubled our capacity somewhere around 2005 and then added on another manufacturing center in Rochester towards the end.
It's interesting to hear your experience with printer breakdowns - I always thought of them as real workhorse machines. But then again I was surrounded by dozens and dozens of each model (except the ML 500, we only had 4-5 of those) and there was a full staff of mechanics running around and a handful of them fixed the printers in addition to the other industrial machines / electronics around.
The 6800/6805 was my favorite - we used to take it out to local events and print off 1000s of free 4x6s for people (we'd take some digital cameras too and set up some sort of "scene" for people). Even running non-stop in the 90 degree sun I only had one overheat on me a couple times.