Makes sense, I've never been to Asia and I was only in Europe for a couple weeks, so the only European airport I saw was Heathrow, where I took the metro.

I'm not disagreeing that it's safer to have a barrier, or saying that barriers aren't a thing, just that it's common enough not to have them to be used to it. I don't think about that danger. I haven't seen a space like that before, no.

I lived in Vancouver for almost a decade, where the trains are driverless and there aren't walls or barriers, even at the airport.

But I did just learn what an automated people mover is, and some of them are adorable.