I read it again, too, and I can see the moment where the narrator wonders if granny isn't as happy as she appears, despite her popular businesses and many friends, and I like your reading that she intentionally seeks out things to be interested in to keep herself busy because living that long could get boring. That seems like a valuable lesson at any age, but also just really basic. And then the story glosses over how anyone could afford to live that long, something nearly unimaginable in our current society, and I'm left wondering what the point was. I normally like Lingen's work, but I guess this missed the mark for me.