It also sets the stage for Rey’s rise as a new Jedi, because after burying theirs, she whips out an all-new lightsaber, one that she made herself. Crafting a laser sword is a Jedi right-of-passage, and the fact that Rey’s saber is now yellow suggests that balance has been restored to the force, something I wrote about at-length here.

It’s important to note that before this nice and tidy final shot, that when Rey fought Palpatine, she killed him with his own power.