If it was the Q that did this (or some other ascended life form with a bone to pic with the denizens of the galaxy), the reason for simultaneous galaxy-wide technological destruction would A) likely transcend humanoid science and B) likely occur to different kinds of FTL propulsion because of C) Q magic that picked the causal sweet-spot for each kind of technology. In the case of the Federation, all the dilithium went foom. Maybe the Romulan ships all made tiny little black holes everywhere.
However, this was a one time “Noah’s flood” deal, not permanently wiping out the tech, but just enough to push everyone back into a more 22nd century-level of interstellar travel capability. Limited, but not completely dead. There are still dilithium crystals around, capable of being artificially grown, but all made after the Burn.
However, this was a one time “Noah’s flood” deal, not permanently wiping out the tech, but just enough to push everyone back into a more 22nd century-level of interstellar travel capability. Limited, but not completely dead. There are still dilithium crystals around, capable of being artificially grown, but all made after the Burn.