Not quite a city building but I think possibly comparable - factorio you can at least get to endgame on pretty low end hardware with decent fps. It even runs on

Not quite a city building but I think possibly comparable - factorio you can at least get to endgame on pretty low end hardware with decent fps. It even runs on the switch. I say comparable because of the number of things moving around on belts, machines, etc. I think would be a similar workload. Although it is 2D...