Lifts are highly useful devices that enable you to travel from floor to floor with minimal effort. They are useful just for making these journeys more pleasant then, but also for a range of other things – providing disabled access, providing you with a means to move furniture and large objects up the stairs and a way to move between sociably so that you can speak with clients or business partners while you move. This is a necessity then for any business with a tall building and many flights of stairs, or for any superstore with multiple levels, as well as many other businesses. And if you have a lift then you will need a lift maintenance contract.
Lifts are very safe and accidents are actually incredibly rare. In power cut it is of course possible for an elevator to get stuck but 99% of cases the elevator will return to normal function once power returns.