Unique 3D manufacturing information which would have been lost when converted to older STEP files (top image), will now be captured by the STEP AP 242 file format and used for manufacturing ...
Those distinctions matter during a CAD handoff because a shape description and a motion sequence answer different questions.
To convert STEP to STL, validate the CAD model, tessellate its surfaces into a mesh, verify scale and surface quality, and inspect the STL before slicing. Moving a CAD design to a 3D printer usually ...