What is ascribed to poor IT is, in reality, real-time IT providing accurate information in the moment.
The inbound timing is a valuable tool most of the time but is subject to change. As others note, when you see the departure time holding but the arrival time of the inbound steadily delayed, you can bet that OPS is looking at an aircraft sub. If the sub can be finalized, the incoming data will update or disappear. If it can't, the delay will post.
The suggestion of a "collapse" is fear-mongering. Nothing more.