My wife and I are obviously only one couple, so this is confirmation bias, but alcohol in general just isn't as appealing anymore. With all this general stress we've been going through (struggling with inflation, insane work hours, insane work conditions) alcohol is causing more migraines, sucky morning-after-drinking symptoms, high calories, expensive prices, there's just no good reason to drink as much as we used to. And it's not like we drank that much earlier in our lives as well.
Tie this all together with marijuana availability which has none of these cons except for high taxes, then alcohol doesn't sound as appealing anymore.