When planning a journey there is always a process to reach the final decision.
First who flys to the destination. Second if more than one airline which has best reputation. Third schedule. Fourth, and probably most important, all up price.
So food and drink will come into fourth category. I wouldn't book a flight on the basis of a free snack but on an early morning flight with little time to spare I would be interested in a hot breakfast. Two gin and tonics will now cost £12 on BA and a sandwich £4.50 add a bag of crisps £1 so now for a couple flying nearly £40 extra.
Remember as well W/T longhaul flights are losing the second meal and next step will be saleable food mark my words.