Down Under has gone completely screw cap.
Now then, let's apply that phenomenon to the rest of the World and decide if this is the quintessential and majoritive issue regarding wine enclosures for all wineries in France, Spain, Italy, Portugal and America.
I predict it isn't even close.
Well, Tim...you may be predicting based on your own feelings, rather than what you know, or what information is out there.
If you delve into this issue a little more you might be very surprised at how much winemakers all over the world are paying attention to the various aspects of closures.
A case in point:
my company works with a major producer of wine in France who sells quite a bit of wine in France, in Europe, and in most countries around the world. We in the US are actually a minor---very minor---portion of his business globally. We had some issues with his wines being cork tainted and we discussed it with him. He went to great extent...and expense... to expand and improve his cork quality control to help limit the problem. Finally, in frustration, he changed all bottles he is shipping to the US from cork closure to screwcap. That's Burgundy, Rhone, Loire and Languedoc, by the way.
We complimented him on doing this...and he replied that he was happy to because he's been doing it for other markets, and he's happy to do it for the US...now that they are 'ready' for it...because it eliminates spoilage of his wine and lots of frustrating QC to help eliminate it. He also maintained that the screwcap, under testing, seemed to be doing a far superior job of protecting the wine so the customer could receive what the winemaker intended when he put the wine in the bottle.
I'll also tell you, Tim, because I recall some of the things you've stated before, that this producer has a long heritage and produces a wide range of wines, from very low priced vin de pays to Grand Cru Burgundies (he's also one of the largest owners of Burgundian domaines, btw). He's not some fly-by-night scam artist, in other words, but a serious businessman and winemaker who sincerely cares about his family business, which his son and daughter are planning to take over, as he took over from his father.
Yet this man is, contrary to your beliefs, deeply concerned about the closures to his wine, and is taking steps to solve what he considers a serious threat to the quality of what he produces. And he's doing it by voluntarily moving from cork to screwcap closures.
You might want to rethink what you're thinking about what people are thinking. Anyway, think about it.