[ergothus]

I'd actually say the relevant group is "people trying to understand the domain" (given the question in the headline).

Which, generally, boils down to a group that is largely programmers, and even those that aren't programmers DO (AFAICT) have familiarity with the "stack" concept (non-technical Eng Managers, non-technical PMs, etc)

I'm not saying you're wrong in any way, just pointing out that it can be said in a way that doesn't sound like "programmers are all that matter" (which I don't think was your intent anyway).