I started out this reply completely first-thing-in-the-morning haven't-had-my-coffee shots-fired snarky just from that first sentence alone. If you want an actual conversation, I'd suggest leaving that at home next time. If not? Well, I'll pretend you want actual discourse anyway, for those at home who might want to learn something new. Besides, part of it was my honest mistake, in trading brevity for clarity. I know my faults well - I can get downright evangelical about vaping if given half the chance, and I'm trying to spare you folks the wordsplosion.
We - the community - have known about those studies for a while. We know that, in the best case, the product that the scientists were testing were the pre-packaged cartridges that come from the Big Tobacco companies like Blu or NJoy. At worst, they were the Chinese imports that started the whole thing. These are not the products that we use, all in all. They're the gateway for a lot of other people, though, which may be why so many independent vape shops are opening up all around the country... and making the market bonkers.
This, I think, is where the miscommunication is happening. We're talking about two vaguely related but separate things.
I likened the community to Makers and Homebrewers. When I said I know the guy who makes my juice? I wasn't kidding - I know his name, I've seen his face, I know what his lab looks like, I know where he gets his supplies. These new vape shops, both brick-and-mortar and online venues, are places run by enthusiasts who are trying to do this thing as safely and enjoyably as possible. When I said that I knew there were juices out there that were nic-free, I should have made clear that I was talking about the products from these small-batch vendors, not the disposable cartridge-based mass-produced ecigarettes.
Speaking of studies, here are some you might be interested in.