And even then, FIM has an established Magic System and a way to go with ot. The prior generations, minus G1, didn’t really have a fixed System, and was loose at best, Deus Ex Machina at worse.
G5 doesn’t Tell us if Earth Ponies have magic powers, or if they can use magic.
G5 may derail Everything just for Hasbro to bandwagon off G4, which currently smacks of Intentional Sabotage!