say a stylist. She can answer the front door of her business or home while in the kitchen or other area. People who use cordless phones tend to leave in rooms and not take with, hence cordless isn't such a solution (because of human nature). There are varied solutions but adding such a drop is pennies in the grand scheme of things.
Building and doing this right the first time is key. You don't have to terminate that drop, but it is there.