This sort of solves it:
I dunno, for me, as long as some food aint too pungent, thereby stinking up the joint for the rest of the flight, do what you want and be cognizant of others.
I certainly don’t like a lot of the food planes sell (at over priced rates) and so I have brought my own when in economy. In business/first I will eat most of what I get but sometimes you just like what you like!