Sheremetyovo used to be a bit different. I got stuck there with a 4 hour delay over lunchtime waiting for a London flight in 1991. Thinking I'd get something to eat and drink I found that the solitary cafe was closed - for lunch! My Russian hosts who were seeing me off had been inured to this sort of thing through years of Soviet control and weren't in the least surprised. As my hostess said - "Well the staff have to eat, dont they?"
I rather think things are a bit different now.