My boyfriend quit drinking 8 years ago. When he met me 6 years ago I, obviously, was still drinking. I did not drink around him etc... but, he didn't like it. Anyway, since I decided to quit drinking (which had nothing to do with him) we get along much better.
It would be tough for me to date someone who had no understanding of alcoholism or even someone who drank moderately.
So, it probably just depends on the people.... like all relationships.