Speed for setup and the connections.
When working a band on a stage we set up floor monitors for the band to hear. These can be powered or Passive. The problem with powered is you connect two sets of wire, Power, and Audio. So if my amp rack supports 4 monitors as individual channels we can use the Speakon 4 conductor and send two channels down one wire to monitor 1, and chain monitor 2 on the second pair. So I connect two wires at the amp rack and have 4 stage monitors running on individual channels. With powered you would have to pull 4 power cables and 4 audio cables. making the stage full of wires to navigate.
When we setup the 4 monitors and the 8 subs and 2 mains we can have 10 channels of audio running on stage in under 40 minutes.