Example, the kitchen was Mom's domain and Dad wasn't allowed in the kitchen except to eat or if Mom needed a bottle opened, etc. Mom had age related limited eyesight so I can understand her not wanting Dad to move things about. Thus, once Mom  passed, Dad  became so lost in the kitchen he does very very little for himself.
Dad is now living in Independent Living. Thank goodness the place offers housekeeping otherwise Dad would need to learn how to use a washer and dryer... or learn how to run a vacuum... or how to clean the toilet.
Dad does have morning caregivers every other day, who make him breakfast and lunch, shower, and keep him tidy, etc. But on their days off, Dad sits there waiting for someone to do this or that for him. He will make himself a bowl of cereal for breakfast and again at lunch even though the caregivers make him a sandwich and leave it in the refrigerator for the next day. Dad's afraid to look past the milk in the refrigerator. It's amazing how things are ingrained in one's mind.
Apparently in the past Mom also had control over the laundry so Dad won't go into the linen closet to put out new towels after housekeeping washes/dries and puts the towels back in the linen closet.... one day I found paper towels drying on the towel racks.
If only my parents were cross-trained.... [sigh].