My bil and sil only take "family" vacations.. which means they go see her daughter or somebody for a weekend. They should have the resources, but I think they have had a lot of moving around, seen a lot of stuff, and now just want to sit and watch tv.
My family has been on one vacation, and that was one of those "family" things as well, and it was depressing because my mil was very ill, and passed away a few months later. We just keep running into problems that keep us from going on a "real" vacation... but 9 years without a real vacation is wearing very thin!