Probably not the same place as when they're 30. When you're no longer working and the kids are grown, school system and job market become irrelevant. It becomes physically harder to care for each sqft, and with a smaller household you need fewer of them. As you lose the ability to drive safely, walkability becomes much more important.
When I'm 60 I want to have the wealth to meet my new housing needs. That could be a previous house to sell. It could also be stock portfolio to liquidate or passive income sufficient to cover rent.
