God bless your Mom. Mine passed away at 75. She had Alzheimer’s and had two massive strokes. I miss her so much. Again, it all depends on a number of factors, a person’s over all health, diet, family medical history,etc.
She lives alone but had to spend a month at a rehab/ nursing home place this winter because her hip broke.
She was so glad to be home. She didn’t like the place because it was “full of old people”.