This. Android is posing a serious problem for businesses as people demand to BYO with phones that are a huge melting pot of unknown versions, vulnerabilities, levels of support for exchange, etc. They need to provide their stack as a virtualized system that can work on any Android handset and then have their own analogue of Google "experience" devices where they do the whole thing. They can make some serious hay out of guaranteeing updates, security and support which the Android vendors largely are either ignoring or failing at.