I have been close to this subject for many years as my going on 96 year old mother manages to live in her home. My father died in 1997, leaving her alone. Fortunately she's financially okay and has enjoyed many friends and family. About ten years ago she had a mild stroke and began to slow down. She still drives, to PT twice a week and every Friday to the hairdresser. She cooks and takes care of her hygiene pretty well. This may seem unethical but over the years I've told her she holds the key to living in her home doing the things she wants to do. The keys were not falling and to let me help her deal with people coming to work at the house. She trusts everyone and they have over charged her and she has let people in without knowing who they are.
She's online a lot, listening to health podcasts and buying hundreds of vitamins and supplements. Last year she lost sense of reality. She was the victim of a scam. She lost touch with who to trust and sent $5,000 to a group who convinced her they were from Publisher's Clearing House. After that I managed keep her from sending close to $40,000 more. The police were involved but she refused to tell them anything about the scammers. All her friends have died and she stopped going to church during Covid. My wife and I help her with groceries and take her to doctors appts. She's becoming pretty forgetful, but she has a drive, a spirit to keep living life her way. There's much more but I don't want to stop that spirit. You either have it or you don't.