My anecdotal evidence is that as my friends and I approached our 30's the amount of people who have reduced drinking or basically quit all together has increased pretty dramatically, including myself. I wouldn't say any of them had any addiction issue with it. I hardly ever drink. Although I never really was a big drinker. I definitely smoke more pot than drink, but that's not a difference from before legalization, and actually that has been on a steady decrease as well. Some people definitely have replaced their social lubricant of choice to pot, or even small dose psychedelics. In reality, of the options, booze has the worst effects from getting sick from having too much to feeling like garbage for a full day after.
A lot of transitions away from beer in general as well. As as younger person our intake was basically exclusively beer, with some cheap hard stuff thrown in. Now there are just better casual options that don't make your stomach feel like trash.
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