Game developers have shown willing to remove and add game features, change art assets and remake parts of their games in following updates, but why don't they ever change the plot? Some times parts are added to the story, but only as attachments, never revisions.
Why is plot thought as a feature beyond editing, even if it would enhance player experience just as much as any graphical update or gameplay tweak?
P.S.: I would like to ask for a game-narrative/writing/story tag, and they are just as important part of game development as game mechanics.
P.S.²: This is as broad a question as why not to release source code. Therefore I think it is not too broad for answering.