If I get to visit Berlin and/or Stuttgart someday, I'll be sure to ride it if it's still operational by the time.
Speaking of snacks - it sounds like what the fancy hipster cafes charge for essentially simple meals. Locomore makes it sound like the ingredients are specially chosen, though. I'm not sure how much I can trust that kind of labeling at this point, but if it's true, some people are going to be willing to pay for it.
Besides. Riding for mere hours on a train to another major city sounds fantastic to me as a Russian. Kemerovo (my hometown) to Moscow takes two days, with up to six people in a compartment smaller than an office restroom.