Would be nice if the interval could be programmed by the owner, or at least offer a few options as i assume most drivers know their own habits more than a programmer. But you're right, it's a sort of teaser to see how well it works in the real world and what drivers think of it.
as nice as that would be, odds are it would lead into a whole host of problems
down the road I can imagine that being possible once these systems are far more advanced.
but the more they can dumb down owning these things the better off everyone is.