propulsion. Additional 3-4km/s of delta-V would allow to not be limited to those once-in-2-years launch windows and significantly decrease travel time. That wou

propulsion. Additional 3-4km/s of delta-V would allow to not be limited to those once-in-2-years launch windows and significantly decrease travel time. That would be a game changer on top of the game changer that the Mars bound Starship is already going to be. Nuclear launch from Earth isn't an option, yet Starship can easily launch a reactor into LEO, fission or fusion (fusion i think will even be more compact), and it can be used from there.