In 2020, Team 2910's robot used belts to pull the balls into a backwards "c" shape to reduce the overall height of their robot. Many other robots using belts as the feeder are significantly taller than this one. Reducing the height of the robot makes the center of gravity lower, and allows for more mobility on their robot while having an efficient feeder.
2910 uses two belts running at the same speed to make sure the ball goes exactly where they want it to go without risk of the balls getting stuck. The belts of the robot allow them to send the balls to the shooter efficiently while making the robot more compact. In addition, they don't sacrifice the amount of storage for their robot, as the robot can also hold 5 balls in the small feeder.
https://www.youtube.com/watch?v=tkJdv7YSEYU&t&ab_channel=FIRSTRoboticsCompetition
In the video, 2910's robot scores many points by being mobile and small enough to pass under the color wheel due to their small feeder and shooter. Them being able to pass below the color wheel allowed a faster path from the intake area to the shooting area. At about 50s into the video, you can see 2948's robot block 2910's robot, however because the robot has a lower center of gravity, it is balanced and was able to remain unfazed from it.
-Sarah Yu