With Microsoft's intentions to clearly differentiate their latest platform from previous incarnations, the final nails to the coffin surrounding backwards compatibility for applications have been determined. During a Twitter Q&A session, Microsoft confirmed pretty much was expected when Windows Phone 7 Series came about – current Windows Mobile software would not be compatible with the Windows Phone 7 Series platform. Despite that shortcoming, Microsoft will continue to support its current platform and promised that they "will continue to work with our partners to deliver new devices based on Windows Mobile 6.5 and will support those products for many years to come." Fortunately for those diehard Windows Mobile users out there, they'll still get that attention from the Redmond based company as many business professionals rely on the vast amount of core applications that they've been using. Some would argue that the new platform will have limited app support during the early part of its availability – thus taking up the status of being garnered as a feature phone. If Microsoft can start the ball on getting a handful of popular apps on board right from the start, it'll prove that they've got a fledgling ecosystem in place for users to take notice.