Stories about "Linux as the underdog" have confused me for several years. The truth is, Linux has won, and it's OK to recognize that. The majority of phones sold are "Linux phones" -- it's the kernel for Android! The top selling laptops for years provide "Linux on the desktop" -- Chromebooks run ChromeOS, which is Linux! Nearly all host servers, at nearly every cloud provider, run Linux. The vast majority of cloud VM…
Any application that tries to use private APIs might be killed by Android Sandbox infrastructure.
As such Google can replace it by something else, e.g. Fuchsia, and app developers won't even notice that the kernel has changed (ART is being ported to Fuchsia).
Then on IoT space, the competition from BSD licensed POSIX clones is heating up, most OEMs don't want any GPL tainted OS on their devices, just in case.
As for the desktop, I already gave up.