Vandalism is the main cause. Howth Junction was a huge problem
Each lift now has a camera watching each door, if the request button is pressed the lift will not respond until a CCTV operator approves. Lift breakdowns reduced to a fraction of previous levels.
Much of the equipment is now 15 years old, some 20 years old. Parts are a challenge, most of the lifts are exposed to the elements also
Ramps don't breakdown, do not require maintenance and do not attract anti social behavior