To bring that forward a generation, there was a period around 2013-2014 when vaping was brand new and schools hadn't written any rules yet.
I remember kids vaping in class and some teachers being kinda okay with it, or at least turning a blind eye. Granted, only like 1 or 2 people in the school had vapes.
I've been reading articles for years about how Google say they're going to open the RCS API to 3rd-Party apps but they have yet to do so.