I just did a bit of schoolboy maths, based on 5 (out of 86) school peers of mine who went on to have addiction problems. The only one who managed to get past his addiction before his 30s was the only one with parents well-off enough to send him off to some religious community in Scotland (from whence he returned "born again"
). The other 4, the last I knew (2008) were all smack addicts getting by on maintenance doses, but pretty much unemployable because of the records they'd built up. I suspect that most of us know cases fom one pole or the other.