I have not seen war games go on that long, some do take a while though, not talking Berg's North Africa though. I think the distinction of a one-shot for an RPG means it is its own thing vs a campaign, which is expected to be long term, at least ideally. I mean, r/rpg is full of threads saying how their campaign died after a few sessions, and "what went wrong?" A lot of what I see in rules discussions are D&D vs the other games, and that encompasses a lot of subjects from theory, mechanics, role playing, ad nauseum.