Whatever else may be in various vape juices, nicotine itself is about as harmful as caffeine. A mild stimulant, addictive, (as far as we know) harmless in normal doses, and will kill you instantly if you get a few grams at once. IIRC caffeine isn't a good pesticide tho, whereas nicotine is great, so YMMV if you're an aphid.

Nicotine alone increases chances for diabetes, and in mice, it produces inflammation of the pancreas even after quitting.

Nicotine alone is probably better than tobacco, but by how much, we are not sure.

Nicotine alone fucks with my hand joints -- whenever I go back to NTR my hand joints, my thumb joints hurt like hell; it takes about two- three months after I completely quit nicotine for the pain to subside.

Caffeine works great on many mammals though, which is how you end up with your dog in the ER if you aren’t good at keeping things like chocolate or coffee beans out of reach.

Humans are just exceptionally good at metabolizing both.

Nicotine is one of the most addictive substances we know.

The mystery additives in cigarettes are far more addictive than the nicotine.

What is mysterious about them? We've known they're things like formaldehyde, flavorings, and additives to help keep them from burning out of control (and thus starting fires).

Source?

Every one is different, and you did less damage thankfully. Now you’ve made a significant change for the better. Why not continue on that path by slowly weaning yourself off it? Besides the health angle it’s merely a waste of money and support of a shady industry. Take those funds and perhaps treat yourself to something positive.

I was completely addicted to nicotine, and e-cigs couldn’t reproduce the hit from smoked ones.

After faffing two years with patches and liquids I took the Varenicline route... it was supposed to last 10 days and i stayed on it one full month but eventually I literally forgot to light up.

It works

at least ecigs worked for you. won't work for for others. depends on how one responds to the delivery method.