- Turnaround time is a major one for SpaceX. They want to stack a new Starship on top of it and launch the booster again in hours, not weeks. By catching the booster they can simply lower it back onto the launch mount, refuel and relaunch.
- No need for landing legs. The legs add significant weight, especially on something as large as Super Heavy. Leaving these out means more usable payload to orbit.
- Turnaround time is a major one for SpaceX. They want to stack a new Starship on top of it and launch the booster again in hours, not weeks. By catching the booster they can simply lower it back onto the launch mount, refuel and relaunch.
- No need for landing legs. The legs add significant weight, especially on something as large as Super Heavy. Leaving these out means more usable payload to orbit.