7 million+ units [1].. Grant not big as Android or Apple but if everyone was to follow your ideology, Firefox OS or Ubuntu OS will never make a dent in the market. This will not only lead to duopoly but eventually end up hurting the consumer choices.
You are correct that there is a big danger of a duopoly. The previously Microsoft-dominated world of computing was boring and in places stagnant. Repeating that hegemony would also be boring and stagnant.
That's one reason why I think viable ecosystems are valuable. The question is whether someone can stitch together a Tizen/Yahoo/OEM or Jolla/Baidu/OEM, etc. axis and make it work.
I would say very many businesses these days use Google Docs, which is compatible with every OS. That's the way we are actually progressing here; everything is multiplatform.
The typical computing customer today would have no idea what Postfix or Libre Office are, nor would they know what Azure is. The whole issue of what matters has shifted out from under those things.
Nor do they care about AWS, Linode and anything related to servers for that matter.
Yet those domains earn a lot of cash for everyone involved, billions of dollars. There are a shitload more things that matter 10 times more than Angry Birds devices.
