FTFY.
It's funny, because the majority of 2016 devices run Linux as stock kernel. And only Linux! So I don't understand why would you even mention this? The situation for Linux has improved by any objective metric I can think of.
Now. Personally, I could not care less about Linux (in fact I would use _anything else_ if I could). I do care about free software, and I've come to realize that the free software situation has not improved that much and IMO it is worse today than it was in 2007. I blame Linux for that. But that's another story.
Clearly you've never bought any mobile/embedded device recently, since I had to go and hunt for a driver pack for my Surface Pro 2, which is a _Microsoft_ device. Arguably, it's not 3rd party, since they actually host it in msdn.com ; the experience is rather similar though.
The N9 and scheduled Lauta could have been exactly that if support / advertising / 3rd party interest hadn't have been gutted due to the Elopement. Really nice phones for most, "hey look, it runs proper Linux" to the ... enthusiasts.