I try not to "this" posts on KF, but this is something I want to emphasize by replying.
Nick was obviously a heavy drinking when we saw him on stream, so I suspect he's a heavy drinker in quotidian life, but there is a big difference between being a heavy drinker and an alcoholic. I really doubt that Nick was the latter, and I would attribute his descent more to the other drugs in the last year or so over the drinking. I could be wrong, of course, but I've known an alcoholic or two and they are a different animal from a heavy drinker.
I knew a guy once who would drink half a fifth of vodka mixed with orange Gatorade as soon as he woke up every day. So fucking sad. He's long since dead.