The "International AirBnB Style" isn't of a place but it's definitely of a time, and that time was probably ten years ago to now. I think it's fading. It always feels like styles will be eternal until they go out of fashion. Probably by 2035 it will be completely uncool and replaced by something different, maybe local. Maybe not, since we're more interconnected than ever, so styles end up propagating fast and wide. In 2050 though, it will be cool again, like all the other things that went out of fashion.