Hardware maintenance is a physical process. When a connection is broken, severed, or jostled loose – someone must reconnect the wire. When a circuit board is damaged by heat or moisture, someone must replace the board to return the unit to service. None of this has changed since the ENIAC (1st computer) began the computer era. The concept of logic gates created with plug boards are still in use – only the production method has changed to switch from very large wires to printing tiny wires into a silicon wafer.