The idea is to have an 8-channel power amplifier in one box ...
I still have to source the right trafo, but one large one would be both lighter and cheaper (new) than, say 4 small ones. An argument to use multiple would potentially be that peaks on individual channels might have less impact on the other channels. Still working on it ...
As some people have pointed out, it protects the liver, but from personal experience, I can't confirm the "not getting drunk" part ... so I'd be really cautious about blanket statements as the one in the title of this post.