Android is just the Linux kernel on the phone -- that's the issue I have with it. It comes with none of the other stuff that makes GNU/Linux great: philosophically/socially it's different, but on a technical level it's missing rest of the GNU/Linux stack (e.g. package management, and the plethora of developer tools -- including languages and libraries). The GNU/Linux stack is developed by a diverse ecosystem of contractors, big and small business, and non-for-profits (e.g. Red Hat, Intel, Mozilla, Samsung, Canonical, Document Foundation, Fujitsu, Google, etc). Android is largely controlled by one company.