I have been playing my game for about five years and my largest city was only 46,000 people in it. Today my largest city has 185,000 people in it, but I have recently hit a dead end. My city is in decline and it has poor commercial demand, but very high residential demand. So every time I have a new skyscraper pop up from the ground, the people abandon ship and the building becomes worthless and black. I have downloaded two buildings to give my city around 13,000 more jobs, but my high wealth CO$$$ demand goes LOWER! In my city there's a subway system in downtown, there's a bus stop system across the entire area, there's an elevated rail system across the area, there's a monorail system in downtown, there's a ferry system, highways, about 20 bridges, and all of these plazas and landmarks and unlockable that are supposed to help demand. I have lowered taxes in the city and neighboring cities so that I can have better demand, but they all aren't working. So I have come to downloading buildings, but demand just goes lower. Can you guys give me advice? SOS!