I'm just coming up to my 4 years vaping and I'm not dead, hell i'm not even slightly ill. I know other vapers who have been vaping even longer and they seem to be in pretty good health too. I'm not too concerned.
what I would be very interested to see (although it might still be too early to tell as vaping really has only come into its own properly in the last 2 years) is proper statistics showing the rates of popcorn lung and any other condition that are linked to vaping/respiratory problems. I'm pretty sure that rates will have, at worst, stayed the same and possibly dropped. As the OP said, most of the "nasties" in eliquid are already in cigarettes but in far higher quantities.
I do have more of a problem with honesty though. Everyone needs to be using a universal method of testing so there can be no question of the integrity of the results. If everyone is in the same playing field then we all know where we stand. And if a company States in plain English that their juice does or does not contain such and such, they had better be telling the truth unless they really want the full fury of the vaping community's witch finder generals raining down on them.