There is something that was losely tied to vaping a while back called popcorn lung. I dont know that its real or if the affects are even long lasting but I dont seem to have had long term damage from vaping. You vape indoors enough you will start to get residue on things. TVs become a pain to clean.

Also to note, niccotine does not cause cancer. But it does start blocking your arteries ability to lubricate. And you still have the constant up and downs of using niccotine.

FWIW, I smoked 20 years or so, switched to vaping and did that on 24mg(i know) for about 4 years then switched to 0mg for 6 mos and quit.

Transition from smokes to vape was hellish for 2 weeks. The changes to your body from smoking combined with the vape is not a good mix.