it is used a lot in Texas wine making (or some version of it), along with acidification. How one feels about those depends on the person.cecil77 said:
LOL, no one uses it, yet tons of it are sold...
And it's a interesting question. Is it "authentic"? What if a winery takes their own wine and concentrates it down and then adds some of their own concentrate back in? Is that "better"?
I'd prefer to drink wine that didn't add it or add extra acid, but no one discloses it so who knows....