The format change is simply an evolution of ability to produce more aesthetically pleasing and functional joints, smaller footprints, and systems that are being tailored in specifics to replace the chaos of workarounds currently at work. Usuage may seem similar, but whats going on behind the pretty interface and your mouse button is very different. This isn't something that many people seem to understand, and its not worth arguing over until you see the results; which an imported file will never truely show, becuase it hasn't been crafted to take full advantage.