Originally Posted by
what next
Why do you keep repeating that all the time? The Space Shuttle was the first reusable first stage, together with it's boosters. Next came Buran, then Falcon 1, then Falcon 9 then New Shepard and maybe Superheavy in sixth place if there are no other classified reusable first stages of which we know nothing.
The important difference is that Superheavy is designed to re-fly almost immediately.
The shuttle Orbiter, boosters, Buran, and Falcon have to undergo factory inspection and an element of refurbishment. New Shepherd doesn't count. It's a toy.
The Chinese have at least two new designs undergoing current flight testing. They're at the Falcon1 stage of development.