Not a single one of those stats, data or predictions takes into account what Boxer has said and many have already seen happen - a move to remote working where you really don't need to be in an office and therefore a city to do your job. My sister works for a company whose main client is effectively the NHS. They have a central office and regional offices throughout the country in cities and large towns. They are allowing the leases for almost all the offices to expire and going to almost all staff working from home. The staff prefer it and it makes economical sense to do it. Yes, just one example as is Boxer talking about his kids doing the same, but there will be many others. Data showing a move into cities from 1975 - 2010 is all but irrelevant given the changing environment, in fact it would be irrelevant if it was data up to 2019. You may not think there will be a move to more working from home and people not having to live in cities but others are clearly worried by the prospect:
https://www.bbc.co.uk/news/business-53925917
While I understand you chose to move into an apartment block in the middle of a city, a great many people do that from necessity and not choice. If (like Boxer's kids) that necessity disappears some at least will choose to make the most of it and leave the city. Not all but many. Certainly having a slightly younger family than you - my youngest has just started secondary school - I'd much prefer to bring up a family out here in the sticks than in the middle of a city. I'm not sure you understand how much the fact it takes you so long to get to the 'great outdoors' that an uBer has arrived before you get from your apartment to the front door simply makes my point about why I'd hate to live in an apartment block in the middle of a city.
I can go into a city if I want and it doesn't take more than a few minutes to get there (if you can call Lincoln a city......). Meanwhile I can stand on the balcony on my garage (which I can have because I have some space) and look out without just seeing buildings and people and hearing noise and bustle. Each to their own but all things being equal I'd take open countryside over inner city any day. Many people will now have the choice when they didn't before. I predict a few will feel the same way as I do.
