"Switch" was a poor word choice anyway, as they didn't cut out the new stuff as much as bring the old formula back and the new formula just slowly diminished on its own.
Just to be clear, New Coke was the most fabulous flop of a product launch since the Ford Edsel, and ended the same way: as a canceled product line, a deep embarrassment to its corporate sponsor, and a popular shorthand for business stupidity. Much like the Chevy Nova/No Va story, except that it's actually true.
This article is #2 on Bing when you search for "New Coke" is below. The title says it all . . .
New Coke and other marketing fiascoes - U.S. news- msnbc.com
The snopes article gives a lot of good background on what happened with New Coke. Why they did it (to copy Diet Coke but with sugar, Diet Coke itself being an imitation of Pepsi which was winning market share) and what actually happened.
snopes.com: New Coke Origin
However, I guarantee this wouldn't work in D&D... resurrecting many of the sacred cows would turn around and alienate many of the players who truly think that what was done in 4E was progressive, and don't want the old cows back.
Of course it could work. WOTC has shown they don't care about backwards compatibility. They could drop 4e in favor of a 5e that looks a lot like 3e, but is only available through DDI and only "open" to the third parties through a GSL that says no more 4e content. Here's predicting it.
