I didn’t say they did. I said they used vector graphics (more specifically, they use vector schematics), with the implication that these vector graphics are “lesser” even than pixel graphics in terms of potential for representational fidelity / skeuomorphism — but also that this doesn’t matter (and in fact, is a benefit), because most sim games are fundamentally about simulating abstract models, not about simulating reality; so a direct representation of the model is clearer and more "fun" than any attempt to embed that model into a view of reality.