Right now, it's just out there, but we have no framework to study them and say, yea or nay, whether they're harmful or not. But that's an example of technology coming in without a framework and taking over.
It requires research. We don't know what's in them. We don't know the product-to-product variability. We don't know whether there are heavy metals going into people's lungs or not. But we see them sold in convenience stores, so we need to get our head around them. That's technology grabbing people.
It might have some benefit, but we need to study it. Right now, it's a bit of a concern to me that we aren't in a position to be able to study it.