Though that’s not due to underperformance of Falcon Heavy. More like there just aren’t many 60-tonne payloads which need to be launched to LEO in one go. Yeeting lighter payloads to high-energy orbits is the optimal use of Falcon Heavy, but the theoretical “payload to LEO” is a useful metric for comparing the approximate capabilities of different rockets.
Though that’s not due to underperformance of Falcon Heavy. More like there just aren’t many 60-tonne payloads which need to be launched to LEO in one go. Yeeting lighter payloads to high-energy orbits is the optimal use of Falcon Heavy, but the theoretical “payload to LEO” is a useful metric for comparing the approximate capabilities of different rockets.