I don’t think it looks remotely sad. It looks like a well cared for house, someone has taken huge effort to keep everything pristine for about sixty years. So someone loved it. For me that makes it happy.
I don’t personally love anything in it enough that I’d keep it, but think it’s typical of many homes of elderly people, my grandmothers was the same.
Years ago doing your house up never used to be a thing. If something wasn’t done you didn’t replace it, but now with home make over shows, so many retail places dedicated to home wares and changes, it is really the norm.
How many threads do we see on here where people say the bathroom or kitchen is really dated and needs replacing. Not the bathroom and kitchen looks worn out and not fit for purpose, but it looks dated, so needs to be replaced for solely that reason. Seldom do we see someone say god I love a dated kitchen and bathroom. That would be a huge selling point for me.