I quit smoking weed quite a while ago and I've never dreamed about it, which I find pretty wild. Was an alcoholic for about 3 years, in total denial about it, drinking a couple of litres of beer each night, then for a month or two at the end I was drinking morning to night.
For maybe 3 months after I quit, I would dream almost nightly about going to bars, or obsessing in my dream about getting drunk and trying to convince people that it's a good idea to drink. At the start they were vivid and I'd be so relieved when I woke up that it had just been a dream. Now I dream about drinking once in a while, but it's more or less gone. Usually I dream of old drinking locations now, or situations in which I would have normally drunk, but I'm not drinking or trying to drink in them any more.
A bit more surprising for me is that when I was a student I used cocaine each weekend for about a 6 month period. Didn't consider it a problem, and still don't. It was just what my particular group did at that time, and one day I decided I'd had enough and just stopped. That was nearly 25 years ago and even now, just randomly, I'll get a dream about it. They're super rare, but they happen, and I can taste it and feel the drip, just as I did back then