Re: growth
I seem to remember seeing three estimates: slow, medium, and high growth. I don't remember if the report picks one specifically and uses it in all of its analysis.
I agree that population growth will continue but actually disagree that it will reach the level you're saying. (Not that I couldn't be convinced.)
Not that the growth rates might be similar to yours, but I think the 2016 ACS estimate is wayyy off and that we didn't go from 617,594 to 673,184. I mean, they're the experts, but I just don't get the feeling that 56,000 more people are walking the streets with me or taking the buses (regardless of how crowded they always are). I wonder if we'd be seeing other effects of 56,000 people (versus a more-conservative number, like 25-30,000), like inflation or power outages or anything one could think of. (Certainly, our unemployment rate has gone down.)