Give me the options!
I'm with the editor, and the Rump-kicking video cards in minimalism world commentator, in that there should be user options to revert back to previous looks and feels.
I constantly recall a situation where a contractor who suggested to change the look-and-feel of an application that the military had used for nearly a decade, and it's prototype was introduced at a presentation as if it was the next great thing. Within minutes, the confiding general and its training and evaluation command staff quickly stopped the presentation and gave a failing verbal review that it'd cost them millions to re-train the military to the new world-wide used application simply because it looked and behaved differently even though it performed the same functions. That happened in 2006 and the new application is still not quite off the ground.
I'm still not over the ribbon-over-tool bars from MS 2007. Let's support backwards compatibility, please!