http://valinet6l6tq6d5yohaa6gdsf2ho4qcqcxyj2nahp5kd4z7nsa6ycdqd.onion/2015/06/17/Why-am-I-leaving-the-Windows-Phone-platform-for-good-today.html
As a developer, you cannot do even the slightest utility app to improve the OS in general, and as a user, you have to wait for Microsoft or in rare cases an OEM to implement a more advanced feature. On Android, it is not uncommon for many features in the OS to start as an idea in the form of an utility in Google Play Store, or an Xposed module, on WP this is impossible, you cannot even deploy apps for your personal use which to the phone which use reserved capabilities.