You're obviously not flying the right airlines/routes. Of the last 20 flights I took, only 2 had the buy on board concept, and these were very short runs (less than 50 mins).
The rest had at least some free juice and biccies (again we're talking hour-long flights) or a full meal (usually cold cuts, salad, and a little sweet in Y and a proper hot meal in C). Longest flight I've taken this year was a massive 2 hours 5 mins.