Simple q about alcohol/smoking

[Frith2013]

If you become an alcoholic, or you smoke, is it like heroin where you have to consume more and more to get the same result?

Or could you remain on say, 10 cigarettes a day or 1 bottle of wine a day, for decades?

I have never smoked or taken drugs but I do drink.
Over the years your ( imo ) does get use to it, so one small glass of wine when you are 17 will have much more affect on you than it would do by the time you are 60 if you drank everyday .
But everyone is different so it would depend on how much and how often you drink.

I’m not a drinker, but have smoked on and off since I was about 14.
During the longest periods of me smoking, I could easily get by on 5 cigarettes a day without feeling any cravings. The only time I would crave and think “omg I really need a cigarette” and I’d get irritable was first thing in the morning. Cup of tea and a cigarette would sort me right out and I wouldn’t particularly crave throughout the day.