One meal a day is not an option while I’m working. Then I take the two meals I eat and stand them side by side and the prospect of eating them within a few hours is not savory. It would be easy if I was sedendary. My first meal today was 1800 calories, 200-400 more than my resting metabolic rate, not a problem. But I burn an extra 800-1000 calories a day with walking and exerciise. Eating all that in one siitting would take most of the enjoyment away. Finally, there isn’t enough time after work to eat that much food and do some exercise and get some sleep.
May be I’ll be retired in the next year. Then may be I’d eat a late breakfast and early dinner and sleep through the hungry part of the day because I’d be going to bed before hunger sets in.