What are the advantages of having more than one windshield wiper?

I’ve always thought having one windshield wiper would be neat. It would cost less to replace one wiper blade and you wouldn’t get “splash” from another wiper blade. The downside, I think, would be wear and tear on the motor as it moved a huge blade across the entire windshield.

Two wipers are considered the standard, although I like the ones that start in the center and work outwards. Again, less chance of having water splashed onto the drivers side as the second blade finishes its arc.

I was looking at a Toyota FJ and noticed that it has three windshield wipers, set up in the “normal” left-hand drive way. Are there any real advantages to this set up? I suppose it would be less stressful on the motors with the job split three ways instead of two. Is there any other reason to have three?