Come on. If you have an elevator, you have a butler.
The weird thing is, I have several friends who built houses with elevators in addition to the staircase. Partly it’s a status thing, I suppose, but partly they’re worried about being unable to use the stairs years down the road.
I haven’t seen any butlers, though.
Actually, most of these folks are a little long in the tooth for “butlers” and “housekeepers” (of that kind, anyway).