In Star Wars, there is a force power that is used by most light side users, notably, Obi-Wan Kenobi, Qui-Gon Jinn, and Luke Skywalker, where they can control their breathing for days at a time (if powerful enough).
I think if Vader used this power (which seems to be used by lightsiders) then I think we could have had a different outcome in Star Wars. Maybe he could have lived longer? Maybe he'd have reached a high potential?
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