Our mom was 95 and in pretty good shape. It looked like dementia, but her brain just wasn't getting enough oxygen. We ok'd a TAVER ($300,000) and she was ok. Just bouts of anxiety and concern. She had to go into care ($5000 a month), with 24/7 assistance ($600 a week with some Long Term Insurance to defray the cost-tooth and nail to get them to pay) for the year she was failing (two falls, broken bones, hospitals).
All of us had some good times together, but she suffered a lot.
She passed, but not before holding and enjoying her great granddaughter for a few months..