I’d say it’s closer to the rule than the exception, but is closer to the middle than either of them.

Yes, a lot of addicts - most, probably - just shift their addiction to something else (hopefully something healthier), but the waters get real muddied when you start defining addiction. Is it still addiction if it’s good for you? Like, if I can’t get through a day without some celery, would people even call me an addict? If I can’t start my day without a run, would anyone ever think to say I have a problem?