This is partly an inverse to the question Are questions about getting emacs-like behavior in other things on topic?
In particular, I'm looking at the remark in one of the answers there:
What makes Emacs what it is is primarily its extensibility through Emacs Lisp, both in the ability to solve a problem by writing code and in the availability of a wide range of packages that do things beyond basic editing capabilities.
It is worth mentioning that Emacs is also extensible via SLIME and other similar interfaces to work with other languages, for example R, Python, and so on. It's somewhat rarer for these interfaces to be used programmatically, but it happens, and there are other extensions, like Memacs that enlarge Emacs's sphere of influence. No doubt user-level questions about these sorts of things are on topic in some form or another.
But what about more theoretical questions, e.g. about how closures work in Emacs Lisp? Or the more polemical claim that "those who don't know Lisp are doomed to reinvent it, badly"? Much in the way Emacs is like the kitchen sink for an OS (or, an OS itself, as some claim, and has at least been partially demonstrated), is this forum destined to deal with everything that forms part of the Emacs Way, insofar as the Emacs way is the Lisp way?
And if so, that is probably not a good thing or a bad thing, but the question becomes: is there a way to distinguish between Emacs-as-OS questions and Emacs-as-IDE questions?
Here is one question that seems like a typical "OS" question: