"As with other drugs, some people can be casual dabblers; other people, well, can’t." I think this is true. Unfortunately people (this article included) tend to talk about it as purely benign or unmitigated poison. I think the reality is that the dose, the frequency, and the role it plays in someone's life make it a positive or a negative. I wish we could get out of the hyperbole to be honest about the pros and cons.

Dose, frequency and role. Exactly like alcohol.