There is a viable 3rd ecosystem out there and it is Microsoft Windows Phone. However, the existence of Windows Phone has proven that developers do not want to

There is a viable 3rd ecosystem out there and it is Microsoft Windows Phone. However, the existence of Windows Phone has proven that developers do not want to support more than 2 mobile platforms. It creates a barrier for entry and support updates if you want to keep all of your platforms at parity. As a result, the fate of any 3rd ecosystem is a slow non-growth existence in the froth of the industry platform churn.