I thought the dilithium that went boom was any that happened to be in the engine of an active starship? I may be wrong, as I honestly stopped giving a **** about the dumb plots and ended up watching it for the visuals.
Maybe. If they ever actually stated that this is why some dilithium was still around then I'll hold my hand up to missing it.
Pretty sure the Romulan use of quantum singularities for power in TNG/DS9 never got a mention though - no dilithium required there, so where did that idea go? And FTL/subspace communications no longer work so even Titan is cut off from Earth in the same solar system...but subspace sensors work well enough to stop the few FTL vessels out there from cramming into stuff?
Ever since the JJTrek films it's like no-one wants to spend six minutes doing a sanity check on the stories and scripts...