The engines have proven repeatability and some have re-flown on a orbital rocket. By the standard of any company outside SpaceX, the Raptor has achieved remarka

The engines have proven repeatability and some have re-flown on a orbital rocket. By the standard of any company outside SpaceX, the Raptor has achieved remarkable things. Its at minimum the second most reusable engine in the world. It has not yet proven to be as reliable reusable as Merlin, but the test programs they have put Raptor threw are considerable. Raptor has successfully landed a rocket, and has successfully landed even an upper stage. Making it the only engine ever to achieve both. If at this point you call that 'premature' then you must be an Asian parent in terms of your exception.