I've always wondered what the economic implications of longer lifespans are. It seems like this is one of them-- imagine we have 80+ year mortgages once human life expectancy reaches 150 years.
Renting with more risks? Depending on system, if the mortgages are recourse or no-recourse... Just imagine getting one such loan in city that dies off, and being stuck with it until bankruptcy. Or large natural catastrophe or sea level rise or long term drought. Basically something outside insurance. If you even can keep insurance...