DH and I were discussing this last night. To my sadness, although not surprise, DH admitted than in the event of my absence he'd probably stop composting, start eating boxed cereal for breakfast again, use regular aluminium-containing deodorant, use disposable nappies, buy laundry detergent, and eat supermarket bread. Mostly because he doesn't know how to do stuff like bake bread or garden himself, and doesn't care to learn. Also, although it didn't come up in conversation, I suspect if I died he'd never eat another legume, ever. We have chickpeas, like, once every three months, but he complains every time.... bitterly. :p
He did say he'd keep buying free-range eggs, "because it's easy", and that if he remarried he'd make sure his wife was pro-breastfeeding and anti-circ. So that's something, I guess.
I felt vaguely insulted at first, but then figured: well, I don't do my "crunchy" stuff for him specifically, but because I think it's healthier/more ethical/tastier/more frugal/more eco-friendly/whatever. And he did say he doesn't mind my crunchy habits (well, he complains about CDing, and he occasionally risks my wrath and buys a block of Nestle chocolate!), and that he likes some of them (homemade bread and homemade ice cream, specifically). So, I guess I can live with the burden of knowledge that if I perish, our household crunchiness will to some extent perish with me. (Dunno what he'd do about meals, though. He's aware of the grossness of takeout and is more anti-MSG than I am, but he also really, really can't cook...)
So what about yours? :p