They are surelly trying, but WP is totally dead. Even Nokia would have jumped off if MS didn't acquire them. I talk as someone who had a WP7, they entered the market to late and without several necessary features. WP7 was a disaster. Just look at the Skype situation, WP7 had the worst version (even Vita's Skype is better!) by far simply because the OS couldn't multitask so Skype only worked in foreground, you couldn't minimize it and still receive messages or calls like the Android version. WP8 fixed most of this problems, but they are still trailling behind.
OS markets tends to monopolies. No developer wants to support a lot of platforms because it takes time and time costs money. If we had 4 mobile OS, the developers would have to support all of them and it's not what they want. Devs actually want one OS for all, just one app. Currently we have a duopoly, that's not to bad but it's already 2 apps you have to made, debug, support, one in Java and the other in Objective C.

















