SpaceX seems to have mastered the belly flop. Landing is getting there.
Seriously! They nailed that part on the first and every attempt. That by itself is pretty amazing.
Starship has flaps, a low terminal velocity belly flop maneuver, and then a rotation up to landing only a few hundred meters up. They definitely build on each other, but this is more impressive.
I feel we missed a serious opportunity with DC-X.
My take is if someone is doing this, they are complaining about the overall lack of progress from an ancient achievement till now. They aren't wrong usually, but our flawed system doesn't make progress in that way.