Anecdotally, I spent ~10 years as a daily pot smoker. I then moved to another country where it's illegal, so I stopped cold turkey in one day. I didn't experience any physical side effects or cravings. YMMV, but at least for me, it was a psychological condition. Once I told myself that I wanted to live in a place where it was illegal, and I wasn't willing to break the law of my new country of residence, that was it.
