My family has a history of dementia and it's terrifying. Currently my grandmother is 95 and more or less can't remember anything from the past 30 years. She doe

My family has a history of dementia and it's terrifying. Currently my grandmother is 95 and more or less can't remember anything from the past 30 years. She doesn't know who I am when I visit because I don't look like I did 30 years ago. She requires 24/7 caretaking and most conversations with her end with "I don't know why the lord hasn't taken me yet". She's very physically weak and struggles to just walk around the house, etc. This has been more or less her state for the past 15 years. Despite the best efforts of the family she is 95 and ready to go and not sure what else we can do.