Throwing around "OS" used to bug me too. Even Android runs on top of Linux. So, is Android really an OS? A distribution? It seems like something more than a distribution--Android contributes drivers and patches to the kernel. But it's still Linux under there.

I finally stopped caring and accepted that "OS" has evolved for most end users to mean a user experience, an ecosystem of applications, a hardware support list, and a technical support strategy. For many developers, it's now the set of tools, services, and paradigms available for development along with an understanding of the number and types of users that can be reached by supporting it. These definitions span the classical distinctions between Operating System, distribution, and even sometimes application. In my line of work, I can communicate clearly with the majority of my customers by referring to things like Android and eOS as "OSes". It's what they expect and I'm okay with that.

Congrats on the launch of Luna.