I have a friend who has been using an e-cigarette for 10+ years. He doesn't seem any less addicted to smoking as back when he was using old-fashioned cigarettes.
I understand e-cigarettes are supposed to help you quit... but has anyone actually had success with them? Or, is it more like trading one vice for another?
I understand e-cigarettes are supposed to help you quit
They're not.
An e-cigarette is just like a normal cigarette, but you're not inhaling burned paper. If you were inhaling addictive substances with normal cigarettes, nothing is stopping you from doing the same with an e-cig.
Do they work? In the sense that they "burn" (in quotes) substances and let you inhale them, then yes. That is their purpose.
An e-cigarette is just like a normal cigarette, but you're not inhaling burned paper.
There are literally thousands of other burned compounds that you're inhaling besides the paper. Everything in a cigarette combusts, and all of the byproducts are things you shouldn't be inhaling. It's definitely not just the paper.