where do lifts go when they are not being used?
I am going to go stand in one and not press any buttons and see what happens.
That may depend on the lift. The one just replaced in my block used to go to the LG, I think. The new one has taken several months to install and I suspect they'll never finish it. I expect there are smartLifts (TM) which can see dimly into the future and then go to the floor where they will be required.
They're programmed to return to the ground floor after a period of inactivity o: