I don't see any issues with this. I mean, if you sleep in and then skip breakfast its the same thing. No news here. I don't think this will way of eating will have any backlash or much resistance. It's nothing radical from what I can tell. Keto is much more radical than this.

Not eating 6 meals a day has been discussed plenty of times on this forum. Idk about only one meal a day as that just seems unnecessary, but if you can get the calories in, why not. Not gonna drain your bodies energy stores before the next meal anyway. The problem with diets like this is not the meal timing, its that nobody sticks to it. Fat people eat too much, bottom line. Tell a fat guy not to eat for 18 hours and they snack all day, eat the 1 or 2 big meals, then lie about the snacking.