Continuous use self-propelled stapling instrument

A surgical stapler, comprising:

• a housing, comprising:
• a handle;
• a housing frame comprising a housing connector;
• and
• a drive system, comprising:
• a first electric motor;
• a second electric motor;
• and
• a third electric motor;
• a shaft assembly releasably assembled to said housing, comprising:
• a shaft frame comprising a proximal connector and a distal connector, wherein said proximal connector is releasably coupled to said housing connector;
• and
• a shaft drive system, comprising:
• a first rotatable shaft operably coupled to said first electric motor;
• a second rotatable shaft operably coupled to said second electric motor;
• and
• a third rotatable shaft operably coupled to said third electric motor;
• and
• an end effector releasably assembled to said shaft assembly, comprising:
• an end effector frame comprising an end effector connector releasably coupled to said distal connector of said shaft assembly;
• a plurality of staple cartridges removably stored in said end effector;
• an anvil movable toward said end effector frame during a closing stroke and away from said end effector frame during an opening stroke;
• and
• a plurality of end effector drivers operably coupled to said first rotatable shaft, said second rotatable shaft, and said third rotatable shaft, comprising:
• an anvil driver configured to open and close said anvil;
• a staple firing driver configured to reciprocatingly deploy said staple cartridges;
• and
• a progression driver configured to move said end effector along a firing path.