So far that data is relatively inconclusive, per https://www.cato.org/policy-analysis/effect-state-marijuana-legalizations-2021-update#marijuana-other-substance

So far that data is relatively inconclusive, per https://www.cato.org/policy-analysis/effect-state-marijuana-legalizations-2021-update#marijuana-other-substance-use https://www.cato.org/policy-analysis/effect-state-marijuana-... "These data show no clear relationship between marijuana legalization and alcohol use. Alcohol use increased more than the national trend in Washington (1 percentage point more), Massachusetts (2.3 percentage points), California (1.9 percentage points), and Oregon (1.2 percentage points) but decreased in Colorado (–0.75 percentage points), Maine (–1.4 percentage points), Alaska (–1.1 percentage points), and Nevada (–1.8 percentage points)." Interesting to see that the data doesn't reflect what I anecdotally have noticed among my friend group: a near-universal pivot from alcohol to cannabis for 50-80% of occasions. Some 100%. That said, my friend group's demographics probably play a part in this.