The ironic thing is that there are no known cases of popcorn lung associated with vaping. The condition happens if you inhale high concentrations of diacetyl (the butter flavoring in popcorn) over a long period of time. So it has been preemptively outlawed as an additive to vapes in most countries for quite some time.
The only actually known case where vaping has caused lasting and terrible damage was when black market THC vapes were adulterated with Vitamin D in California some years ago, which is highly toxic when inhaled. It had gone through the media to show the dangers of vaping in general, even though that would be like saying cigarettes should be outlawed because people got harmed from gas station spice