At the end of the Green Mile, there's the slightest chance that John Coffey might have been executed.

"Potentially"

He straight up did. Power was derived from a whole new emotional source which requires a different skill set to extract. This power source is also 10 times more potent than the previous power source. The factory that once trained it's workers in horror and fear now trains in entertainment and comedy. Waternoose's crimes and conspiracies were laid bare to the public and scream energy would never be trusted again.

This is a base-level reading of the film's ending, not a shower thought.