Former Microsoft executive Charlie Kindel has knocked over a hornet’s nest with this post questioning why Windows Phone has failed to gain any substantial traction despite the fact that it’s a top-notch operating system. Kindel blames a lack of support from carriers and handset providers — and while I agree that’s been a huge hindrance, many others don’t. MG Siegler claims that Microsoft was simply too late to market, Robert Scoble cites a lack of support from app developers, and Harry McCracken wonders if it’s simply a branding problem. All those differing opinions illustrate the fact that Microsoft still has multiple problems to overcome with its mobile business. Which means 2012 may not be any better than 2011 was for Redmond in mobile.