Agreed. If her mentation and executive functionion are normal and she can navigate with an assistive device safely in her home there's no reason to live elsewhere if she doesn't want to. Elderly people live alone all the time. They often decline faster if moved to assisted living so why do that if they prefer and can safely remain their own home. She has in home help, and surely at a level that suited her needs, I cannot imagine SG not providing her that without question, up to 24/7 care. If her home wasn't one level, she surely used it as a one level and probably had chairs she could rest in strategically placed every 30-40 feet if she needed to sit. This is not a big deal for an 84 yo to remain at home without cognitive decline. She is a competent adult. It's her choice. Surely someone has talked about mitigating fall risks and trip hazards as well.
IMPO