Remember broken Nexus telephony? This is how Google treats it's customers
Of course there are multiple rationales for choosing a platform, but support is certainly one of them.A while ago someone made a nice graph of how good Apple/Google are at maintaining OS support for their devices, it's pretty informative (although I'd like to see a new one). http://www.fidlee.com/android-support-vs-ios-support/In this case the Nexus 4 is still officially supported by 5.0... but not being able to call on a phone seems like unsupported to me.