[Chode]

OK, thank you... i did not know that

i thought they all landed upright

[NorthMountain]

When operational, Starship and Superheavy will carry out powered landings on land, back at the launch site.

As a historical note, the first few test landings of Falcon-9 were on water. The brought the booster to a halt just above the surface, and then let it fall in the drink.

SpaceX feature film: How NOT to Land an Orbital Class Booster

We've come a long way!