It seems that in the post-war era we settled on this notion that families should largely remain rooted and stable, and that became part of the modern "American Dream". I wonder if all of that is just a long-term backlash against the forced migrations of the Great Depression, made possible by the economic golden age we were going through at the time.
For my part I'm putting off buying a house precisely because it'll decrease my mobility.
Or maybe you're right and it's a longer term trend:
https://www.citylab.com/equity/2017/02/american-mobility-has...
Looks like a good topic for a book for anyone who has the time. I'm sure it's a confluence of several factors. :)
http://geo.msu.edu/extra/geogmich/rr-logging.html
Land purchased for the timber would be a prime candidate for disposal once it was cleared.
Unlike you, (and I don't mean this in a negative way, it's a complicated discussion) I actually did the opposite and committed myself to the city I currently reside in, less there are 0 economic opportunities to be had, and I volunteer and participate in my community and get to know people. It's easier to build strong communities when you at least know the other people in your condo building.
I agree that moving around makes developing strong ties tough. Once I get further along I'll reconsider taking my foot off the gas a little. My standard is essentially: "If I was trying to convince my kid to go into engineering, would I use my job as an example to aspire towards?" Right now, while I'm grateful for my job and the work certainly isn't bad, the answer is no.
So I think there is something to this. Moving around probably got much harder due to rising real estate prices.
We also have high transaction costs for homes. Considering both sides of the transaction, something like 10% of the home's value is eaten up by various fees.
So nobody can afford to move. BTW, this is a huge source of our traffic problems, the other being school districts.