One of the biggest problems is perceived intrusiveness of whatever tech you propose. My mother, who has Alzheimers and is in a memory care facility, sometimes just refuses to use her walker. She's not all that prone to falls, but she seems to hang on to more able people a lot when she walks. If she was in better command of her own mind, she would probably see the logic of using mechanical assistance, but as it is now, if she's made up her mind that she doesn't want to do something, often no amount of persuasion will help.