Incorrect, Kees Cook, who more or less founded the KSP project (kernel self protection) has been working on this for several years to enhance the security of ChromeOS while working for google. He started some of it when he was working for Canonical and has been doing this non-stop. The problem is that getting things into small individually testable components is literally anathema to the Pax/grsecurity model. They have very specific "chunks" of functionality which are quite invasive, by design. This goes against the model the Linux kernel is developed, so the two development communities are simply mutually exclusive.
https://www.linux.com/news/google-developer-kees-cook-detail...
He's been working on this for a very long time.