Why skipping inflight meals could be good for the planet
https://edition.cnn.com/travel/article/skipping-airplane-meals-sustainability-cmb/index.html
Reduction of inflight meals is initially the mindset of Low Cost Carrier. So, I think it's not a brand-new idea.
The difference between Low Cost Career and Legacy Carrier about inflight meal is just chargeable food or complimentary food.
I don't know why it's taken up as new service by Legacy Carriers.