FWIW, it doesn't have the ring of Twain to me. The sentiment, perhaps, but the diction and syntax no.
- B. Clay Shannon 

    On Wednesday, August 14, 2019, 02:25:43 PM PDT, Kenneth Sanderson <[log in to unmask]> wrote:  
 
 A number of sites attribute this quotation to Mark Twain, but none of them
give a source.  Can anyone verify that this is by MT? "Too much of anything
is bad, but too much good whiskey is barely enough."  It is probably not a
coincidence that it pops up on sites of whiskey distillers.

Ken Sanderson