I don't mean to be dismissive of your general sentiment, I think we agree - I just think your example is a bit superlative. I think when viewing exponential tr

I don't mean to be dismissive of your general sentiment, I think we agree - I just think your example is a bit superlative. I think when viewing exponential trends we need to consider the maximum 'carrying capacity' - typically when something is growing exponentially there is some latent 'available energy' that is being consumed to fuel the growth. Once consumption reaches parity with that energy production - growth may continue for a bit longer as 'excess reserves' are drained, but a trend reversal becomes inevitable. > even the worst cities of 2018 will be unaffordable for the regular person. In your city example, I'd argue that once a city is too expensive for any 'regular' person it will create a negative feedback loop: if unable to source enough labor to satisfy the service demands of the wealthy residents, those residents will begin leaving, reducing housing prices until the problem is at least somewhat mitigated.