Thanks for not getting annoyed with me.
It wasn't my best moment, but I still think I'm essentially right...

I like that last definition, that is surely one thing that is very problematic with Android devices.
Another point - or possibly the same, in less technical terms: despite the OS being largely opensource, Android is made with a very different mindset and specifically designed to resist (benign) hacking and push its users into proprietary services. (good article on the topic)

One more point: While Android is Linux, it is not GNU/Linux. The term GNU did not make it into everyday usage like Linux did, but it's just as important. In other words, what people generally refer to as Linux has always been comprised of those two parts. GNU is not only the license, but also most of the software that runs on top of a Linux kernel and makes it an operating system. IMO and for example, Sailfish OS is GNU/Linux, while Android is not.

So, according to what you write you're really more interested in the operating system than the hardware itself.
Yet your roundup is about devices... this still confuses me.
So you list the hip scene devices and make clear what OS exactly they can run and what not?
I like how the list looks now, no doubt due to some recent edits.