Currently, mainly the "Simple City" demo has revealed issues with scaling the simulator to larger cities. The problems so far appear to be that certain objects aren't turned off for some buildings resulting in performance problems, high context switching between SBS sim engines when there's hundreds of them, the app appears to load slower and slower over time (heap fragmentation?), and high memory usage during loading.
Currently, mainly the "Simple City" demo has revealed issues with scaling the simulator to larger cities. The problems so far appear to be that certain objects aren't turned off for some buildings resulting in performance problems, high context switching between SBS sim engines when there's hundreds of them, the app appears to load slower and slower over time (heap fragmentation?), and high memory usage during loading.