Dtail
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
I've observed this same tendency among all my older relatives, too. Life really seems to slow down to a snail's pace around 85 (or 80 for some, or even 75), with very little money spent on anything other than the basic necessities. Having said that, though, I still put in 95 when using the various retirement calculators, since that gives me greater confidence in the resulting SWRs.
There are always exceptions. My father has slowed down greatly at 89 y.o., but my mother still runs her part time business and takes spin classes at 86 y.o.