I always hear this, but infact every neighborhood I have lived in, has had the same neighbors for YEARS. I find this hard to believe

Probably right. It’s prohibitively expensive to sell a house/move at the current price points, transaction costs and increased tax basis will not make it possible for most.

I know a few friends who want a bigger place but are STUCK in their homes because they cannot afford to upgrade even though they bought 7-10yrs ago.