My grandmother insisted on staying in her home and we scrambled to make it work. She was in a mid-century traditional ranch - narrow hallways, small bathroom, steps down to both the front and back doors. We did make it work with some modifications - for example, hinge kits that make a standard-width door open just that little bit wider to accommodate a wheelchair - but in hindsight I don't think it was the right thing to do. It wasn't the physical environment that was the problem, though. It was the isolation. She wanted to stay in the house she and my grandfather worked their whole lives to finally buy and lived in for 30+ years before he passed, but she didn't drive and as mobility became a problem had a harder and harder time leaving the house at all, and as her siblings also started to develop health issues of aging, she ended up alone much of the time. We did what we could, of course, but around work and school and all of that, we couldn't be there every day much less during the day. And I think that isolation exacerbated her other health issues. Some of her siblings moved into seniors-only condos or apartment complexes, usually under pressure from their kids, and in the long run they seemed to fare much better. I can't help thinking just having daily contact with friends, activities like knitting and bingo, and something more to their "world" than the four walls of their own home has something to do with that.
But for all we learned there, and despite my mother saying she didn't plan to do the same things my grandmother did, all signs point to her doing just that now. She's 70, just starting to have mobility issues, and still driving - it is a good time for her to look for a more suitable arrangement, while she's young enough and active enough to jump into the social life of a new place and still able to get back and forth to keep in touch with old friends during the transition, but she's not interested in doing that. So I guess there's no amount of logic or experience that will override the emotional attachment to a particular place.