In less than 50 years, Chicago went from a town of fewer than 5000 to the second largest city in America, with well over 1 million residents, yet during that period:
a) Skyscrapers didn't exist until the end of the period
b) Mass transit as we know it didn't exist until the end of the period
c) Half the city burned down in a single fire, leaving more than 100,000 people homeless
My grandfather told me that his commute from Santa Clara to Lockheed in Sunnyvale involved mostly driving past orchards all through the 1960s and into the 1970s. He left the area in the 1980s, saying that traffic and livability had become too much of a problem. It's been decades of intentionally not addressing the problems - nobody can reasonably claim to not have known or anticipated.
>Nobody can reasonably claim to not have known or anticipated.
Suggesting that people could have predicted the dot-com boom of the 90s or the tech/startup driven boom of the past 15 years (and that it would be so heavily focused in the Bay Area) seems a little far fetched. It might seem obvious now that it has already happened, but in the 60s and 70s I don't see how you could have known (the industries driving development then were Defence and Manufacturing, both nearly nonexistent now). Plenty of areas in the US were increasing in density and economic development during that time, only one of them became Silicon Valley.
Silicon Valley was admittedly relatively pricey even by the late eighties. I turned down at least one job in that timeframe because of the CoL difference and I lived in Massachusetts which wasn't extraordinarily cheap.
But there certainly have been rapid changes, especially in some currently popular cities. For example, I believe Boton was still losing population in the 1990s and, at one point, when Teradyne moved out that was pretty much the last tech company in the city (including Cambridge) leaving. There may have been some early biotech but pretty much none of the Route 128 computer companies were in the city.
New York City was also in pretty dire straights in the latter part of the eighties.
My grandfather told me that his commute from Santa Clara to Lockheed in Sunnyvale involved mostly driving past orchards all through the 1960s and into the 1970s. He left the area in the 1980s, saying that traffic and livability had become too much of a problem. It's been decades of intentionally not addressing the problems - nobody can reasonably claim to not have known or anticipated.