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Microsoft CEO Satya Nadella admits giving up on Windows Phone and mobile was a mistake
(www.theverge.com)
This is a most excellent place for technology news and articles.
Well, the idea behind FOSS is that you can share the common stuff and build your own stuff on top and while doing so improving the common stuff, testing uncommon usecases and adding features.
Personally I would love to have another bigger company working on Android next to Google, because that means they would (hopefully) implement their own "google services", to not rely on Google.
If that takes off, then apps will need to support both, making it more sensible to either create stable generic interfaces, where a third completly open-source implementation can more easily dock into, or not rely on them unnecessarily.
The only real problem with android is that the license is not GPL, so companies are not required to cooperate and likely end up creating their own silos.