I put the blame squarely on Microsoft, how they released a turd with WP7 (a shiny one with responsive UI, but nonetheless a turd).
About phone OS upgrades, remember the HTC HD2 which originally released with WM6.5 but could be upgraded to WP7 and then to WP8 through after-market community ROMs. It was also Microsoft's decision to not officially allow that.
About phone OS upgrades, remember the HTC HD2 which originally released with WM6.5 but could be upgraded to WP7 and then to WP8 through after-market community ROMs. It was also Microsoft's decision to not officially allow that.