I think overcrowding really means congestion to most people. Any quick population spike will cause congestion as infrastructure takes time to scale. Some form

I think overcrowding really means congestion to most people. Any quick population spike will cause congestion as infrastructure takes time to scale. Some forms of congestion: 1. Traffic 2. Reduced parking 3. Waiting at restaurants longer 4. Housing and living costs becoming quickly unaffordable 5. Longer commutes and travel times. 6. More noise