Elon Musk originally planned for Crew Dragon to land with rockets instead of parachutes. That way the same spacecraft design could land on Mars and Earth. Also,

Elon Musk originally planned for Crew Dragon to land with rockets instead of parachutes. That way the same spacecraft design could land on Mars and Earth. Also, it is "how a rocket should land". Then they discovered that NASA safety concerns were going to slow things down a lot and that a Mars landing craft could be a lot better with a different design. SpaceX's in-development Starship is now the craft that will be able to land on any small planet in the system. A quote from[1]: SpaceX now favors another type of recovery. "The reason we decided not to pursue (powered landings) heavily is it would have taken a tremendous amount of effort to qualify that for safety, particularly for crew transport,” Musk said. “And then there was a time when I thought that the Dragon approach to landing on Mars, where you’ve got a base heat shield and side-mounted thrusters, would be the right way to land on Mars, but now I’m pretty confident that is not the right way, and that there’s a far better approach.” Musk did not elaborate on the new concept for landing on Mars. “That’s what the next generation of SpaceX rockets and spacecraft is going to do, so just the difficulty of safely qualifying Dragon for propulsive landings, and the fact, from a technology evolution standpoint, it was no longer in line with what we were confident was the optimal way to land on Mars,” Musk said. “That’s why we’re not pursuing it. [1]https://spaceflightnow.com/2017/07/19/propulsive-landings-nixed-from-spacexs-dragon-spaceship/ https://spaceflightnow.com/2017/07/19/propulsive-landings-ni...