Discovery spoilers. So, we were all way off with our theorizing. It was'nt the Pah Wraiths, the Omega Module or a Time War. It was... Spoiler All the dilithium randomly blowing up one day (though presumably it only happened that once and only to the dilithium being used, given that peaple still use it as the episode itself shows). No gonna lie, that's pretty dumb. But I'm sure there's an actual reason they will eventually reveal that makes sense - I.E that it did'nt just randomly blow up and was in fact made to by someone - so I'm withholding my judgment and honestly at this point I enjoyed the episode so much it's not even something that bothers me The did mention the Temporal War (which presumably refers to the hot war from Storm Front, not the cold war*), and explained why they don't have time travel technology anymore - though one has to wonder how you prevent peaple from building more time travel tech, and who you police rogue states/actors who do have/get it without yourself having time travel tech *this excites me, since I was doubting if they'd even acknowledge the future as presented by Enterprise and it gives me hope that they'll do more, but at the same time I don't want them to step on my headcannon that the ENT time war is Doctor Who's Last Great Time War, which has *only* been able to exist all these years becuase we know virtually nothing about the Trek timewar.