At 2017's International Astronautical Congress, Elon Musk claimed that SpaceX could master propulsive landing without landing legs.
The assertion was that Falcon 9's "next version" could "land back on its launch mount".
Guessing that by "next version" he meant the recently flown Block 5, I wonder if Block 5s will ever fly without landing legs. Same thing with Falcon Heavy.
Obviously, there are no launch mounts on the drone ships (at the moment). However there is quite some percentage of boosters returning to the landing zones, close to their launch pads.
Is that vision even possible? How would a launch mount have to be modified in order to support landing rocket boosters?