Excellent question. The product would have to be compelling to entice older people to move. And generally speaking, what we have come to know as "the projects"

Excellent question. The product would have to be compelling to entice older people to move. And generally speaking, what we have come to know as "the projects" have a reputation for as petri dishes for crime and other social ills. I'm guessing a "project" inhabited with older people might avoid that stigma. Moreover, it might thwart the NIMBYs who protest every proposed development in ways that ordinary projects wouldn't (what, you don't like old people??? AARP, aux barracades!) So at least it stands a better chance of being built. Not claiming that personal experience is data, but I live in a neighboorhood that emails everyone every time city hall has a proposed project on their docket. And those who show up voice the usual objections - traffic, other infrastructure concerns, "quality of life" issues -- essentially telling potential newcomers to move somewhere else. Having said all that, I myself am a couple of decades from official retirement age, but my GF and I wanted to move to a house that had no stairs. Talk about a housing shortage! That requirement alone filtered out about 90% of the available housing in my target area. So there might be an opportunity, though what form it would take, who knows?