Well, tomorrow begins this experiment; the first page I'm watching becomes "eligible" for change to a custom object.
Even then, I think there needs to be a time limit so that the page doesn't languish forever as clutter. A week? Two weeks?
I hope this works; it's at least worth a try. If it doesn't, I will probably just start going the delete route after a day or two unless it is obvious that substantial work is being done.