Given the amount of disagreement, I'd expect it is common enough but with some multimodal distribution tied to culture, geography or job type, so that the two modes don't notice each other. Happens with lots of stuff. My N=1 is that I probably know fewer people who skip breakfast (to include calories in coffee) than I do people who do 20:4 fasting. I like how I felt on 20:4 but it is easy to fall off of for social reasons, and womce I do, the blood sugar related cravings come back so I need a 48H water fast to get back into effortless 20:4.

It’s more common in parts Europe than you’d think I guess, with the last calories around 8-9pm until 1pm (or 11pm until 3pm a bit southwest of here) there are variants around that of course and I’m less sure how common this is everywhere in Europe, but where I’ve lived a lot of us eat like that. It’s not some fad just a long held habit, not sure where it came from or why so many of us seem to do it here.

That said, it is changing by the day and I see more teenagers snacking at odd times.

In America, I find that anyone “snacking” is overweight or obese.

There is no need to snack. Meals are plenty enough as is, and as this thread is indicating, maybe even one meal too many.