I mean, it’s gotten me laid a bunch, and also has had me make new friends. Also a promotion (probably)

Taking that further, it has also probably had a considerable effect on population numbers. Alcohol probably adds to the birth rate.

I'm not sure how well that hypothesis would hold up in a quick comparison of alcohol consumption per capita vs birth rate.

Space aliens looking at those numbers might even mistake alcohol for a mild contraceptive.

A prevailing theory is that humans started engaging in agriculture, which was less efficient than hunting and gathering in the start, because of the desire to consume alcohol. It is difficult to argue that agriculture has not had a dramatic effect on population numbers.

Possibly at the high end of consumption, also possibly, your parents had a glass of wine or a dash of alcohol just before your conception.

"net positive effect" is subjective. Drinking is fun and eases social interactions; I personally value that more than whatever downsides there might be to memory formation.