>>8352
Also, Discord is, as Sunny points out, something of an unreliable narrator.

>>8350
>All and all, I am mixed to negative on the lore that was established here.

TBH I think the correct solution IS to destroy the crystals; they're containers not an actual source.
Based on the tale given here, breaking all the containers should return magic as a whole to the world. Which means if the tribes want to retreat again there's no downside BUT neither can any malign actor hold magic hostage.