Mostly out of necessity (when I leave work), I have become a late dinner eater, so a 10:30 p.m. dinner is not too bad for me. I'd just assume eat the free meal on the plane than pay for one that I otherwise would not have to buy.

I really cannot sleep on planes, especially on early evening departures to Europe (the flight arrives at my normal bed time and I am not, sadly, able to sleep on demand), so the meal helps pass the time.