Yeah, there's craving ... and then there's craaavvving. I believe my body needs something when I crave foods, such as fish, steak, or certain vegetables. Most of my other cravings are psychological in nature, though.
20+ years recovering addict here too ... I always reserve a little bit of skepticism with respect to wikipedia.
The reason I was, and still am, utterly convinced that my cravings were simply my brain's way of notifying me that something else was needed was because of how I've responded to smoking cessation with vaping -- I felt as if a 25 lb chain had been removed, absolutely freed from slavery, from prison; the first time around, last Feb, I experienced zero cravings, zero withdrawal, zero discomfort -- it was like, uh, smoking? why would I do that, when I've got this? But after my appendectomy, my IBS went absolutely BONKERS -- IBS does that, with ANY "messing around" with the colon. So even though I had absolutely zero, even *negative* desire to smoke... my brain was sending a different message. As I said, at first I resorted to cigarettes; they tasted foul and burnt my mouth and I had to wash up after every one, to get that stink off my hands... but it got rid of those awful cravings. After a month, I phased them out again, with vaping, and all was well, all was GREAT, I was deliriously happy to be smoke-free again.... and 10 days later, those godawful bone-deep cravings came back. By then, I'd acquired some WTA, so I used that instead of succumbing again to cigarettes... and the cravings completely vanished and have not returned. And now I'm down to .7% WTA in my ejuice, so I'm nearly done with it. YAY!!!
Andria