> All of that said, a bigger problem was dumping goodwill of developers. WP7, WP8, and WM10 all had new frameworks for apps that were needed for new functionali

> All of that said, a bigger problem was dumping goodwill of developers. WP7, WP8, and WM10 all had new frameworks for apps that were needed for new functionality and didn't work with prior Microsoft OSes; calling the WM10 one 'Universal' was darkly humorous. I think this was somewhat overstated, since compatibility in the other direction was great. I wrote a WP7 app that worked fine across WP7/WP8/WM10 that I supported until MS pulled the plug entirely on the ecosystem.