I personally believe that reddit is the type of company to save the orginal post and revert it just out of spite
They have been reverting them. I've been observing it in action my my Reddit account as I delete things. Even old posts that I recall deleting years ago (like random things on r/Hearthstone after I stopped playing Blizzard games) have been making a return over the past month. I've been going in and doing batches of edits to my post history every few days, and editing it differently. From ten years ago to now, I've had posts re-appearing and the edits getting un-edited.