I spend a fair portion of my weekends at my parents - they are well into their 80s now and Mum has "memory issues" (because we aren't allowed to call it by the D word in Dad's world, because people write people off if they say that word).
This has put Dad into the position of carer, and he does it as well as he is able - but Dad does have some frugality issues that border on him calling his children crazy about expired food etc.
I mean, I have to give him he is still alive, but I think part of that is because Mum did pay attention to such things for a large portion of it.
He recently ran out of pepper for the table. Rather than buy some more pepper, he figured that Mum had many spices in the cupboard unused since - well, in some instances since the 1970s (because everyone knows that spices don't go out of date *).
He figured Paprika would work, since it added some colour to what was being seasoned and sounded like pepper.
Inevitably, his paprika ran out - I did pull him up and make him buy pepper in preference to his next choice - Nutmeg...
I don't think that his sense of smell or taste are all that crash hot these days.