Re: Eh?
the Linux kernel is only a part of Android. Google could at any time decide to swap it for something else
Technically they could, but why would they ever consider such a thing? The Linux kernel is available to them for free, and every time Torvalds and co. release an update they get a raft of bug fixes, performance enhancements, and feature additions available them without having to put a penny into R&D. Dropping Linux from Android in favor of a different kernel would be a stupid move for Google.