On top of that, most jurisdictions (in the US) subsidize property tax rates for senior citizens, so there is a lot less price volatility for simply remaining in one’s home (or even moving to a different, but smaller detached single family home).
Unless a person specifically wants an urban lifestyle in a shared building, I don’t see much impetus to move out. Worst case, they get to stay in their home they have gotten used to and have space for visitors, best case they save a bunch of money and sleep easy knowing their costs are more controlled.