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Could the problem be that all the money went into building roads and car centric cities, and no money was spent on making mass transit better or rethink on how urban sprawl might cause massive traffic problems?

I still remember that in the 90s till the 2000s you would get maybe 60 to 90 minutes of battery life out of a new laptop. Then it jumped to 4 or more hours thanks to better batteries, more energy efficient CPUs and displays.