I agree with your post Eloethan - except that I don't think it is trivial, and you go on to say that the the food in those days was freshly cooked from scratch; some schools do manage to achieve this today, but with the rush to provide free school dinners many schools have to 'bus' them in from elsewhere. I do hope they are improving on the rubbish that my DC were offered in the 1980s and 1990s. I used to send them with a packed lunch but they used to look longingly at the chips, chips, chips and burgers etc and ask if they could have them one or two days a week, like some of their friends.
I don't think school cooks had heard of curry when I was at school gillybob although DM used to make one with leftover Sunday roast!
People eating and drinking on the go