Linux has become simply the invisible platform upon which so much runs. This is true by virtue of not only Android, but other stuff. Take notice, though, that more and more businesses are shunning Linux in favour of BSD. PS4, most routers, switches, increasing numbers of embedded chips now run NetBSD and OpenBSD (esp. in wi-fi security space). Businesses are also increasingly wary of the GPL and using maximally free licenses like the BSD/ISC/MIT. I'm considering this myself.