These things are just sooo very hard.
Occasionally my dad has a glimmer of light and warmth and we get the sense that he is still in there. But it's getting very, very rare.
Just awful.
My ex wifes grandfather had Alzheimer's and was in a home (he kept taking off on a tractor or his P/U on the ranch), problem was he'd fall down a lot and get hurt. I built a roller frame/walker out of PVC that would bounce off the walls, and mounted his favorite old saddle on it. He'd just wander the halls all day "Riding the Range". When he died the nurses called and asked what we would like to do with it. I told her there must be some other old cowboy there who could use it. She was very appreciative.