I think that if there was ever a 5th Season of Star Vs. The Forces of Evil or a 90 minute movie on Disney+ then they would probably retcon the ending of Season 4 to show that she didn't completely destroy the magic and that'd be one of the things that they'd focus on because I feel like there'd be a lot of things could do with a story like that if you ask me personally since we could be able to see what came from Star's actions in Cleaved