I guess I’d refer people back to my OP. I don’t find the original formulation (rpgs are a subset of storygames) at all useful because it promotes more vagueness, not less. It’s like calling Battlelore “a miniatures game” because minis are on the table, where it’s the rules of play that would help me understand if it’s something I’d be interested in.

So I guess I’d ask: is formal fiction-making the most important distinction to you? Or would it be inhabiting a role? The role thing seems more specific to me, personally, so a subset of that is more useful to me. It would be much less useful for me to try and evaluate Baron Munchausen alongside Burning Empires just because they both have scenes.