Neither decision will save medicare, social security, education or the middle class.
Harris will do what she can, same as Biden has, but neither has any effect on disinformation, bigotry, division or inequality beyond shaking their fingers in disapproval, if it even is disapproval and not just saving face for us.
Trump and his kind are a virus. I'm not saying there is no solution, but the current methods our society governs by aren't doing a solid job of dealing with it, to a point that they may even be making it worse by being too cowardly to put a foot down. They won't save America. They're as much a part of the corruption as the corruption. They'll only go as far as to protect themselves.
I don't make these predictions with any sort of supernatural foresight. It's what Biden and Obama did, it's what Harris will do, keep the seat warm until it's red again while the planet dies, respective kings and queens of the ashes.