this doesn't make sense for Starship - Starship is RTLS (return to launch site), and a cable/net catch system creates an unnecessarily complex launch tower.
The cable catch system for long march 10B is superior to the landing legs of falcon 9 - of the 11 falcon 9 failures, a cable catch system would have avoided 4-6 of them. Removing the landing legs also reduces the rocket dry mass and increases payload mass to orbit.
If SpaceX did Falcon 9 again, they would likely use a cable catch system, as it resolves about half of falcon 9's historic landing failures.
The cable catch system for long march 10B is superior to the landing legs of falcon 9 - of the 11 falcon 9 failures, a cable catch system would have avoided 4-6 of them. Removing the landing legs also reduces the rocket dry mass and increases payload mass to orbit.
If SpaceX did Falcon 9 again, they would likely use a cable catch system, as it resolves about half of falcon 9's historic landing failures.