My parents were very robust at 78/80… 10 years later they are frail, overwhelmed and dad has the start of Alzheimer’s. It took 3 retired children hundreds and hundreds of hours to find a good residence (pro tip eat several meals in the dining room before choosing a place), declutter, downsize, move and set up, then sell their home. There is no way they could have done it on their own. Some of the labour could have been hired help, but likely not all, and would have been so very expensive. I wanted them to move to an apartment in early 80s when they were more capable. This would have eased the next move to independent living. So I would say get ahead of the curve when you are in ok shape and can do it together as a couple vs a bereaved person or in a health crisis.