Re: So here's a thought:
The speed of light is really the speed of causality: it's the fastest way any information about an event can get between any two points
Well, quantum entanglement appears to be faster in some situations but also prone to destroying the information… One of the reasons why it's so hard to align quantum theory and relativity but it wouldn't surprise me if someone at some point came up with a way, along with a more fiendish problem because that's how quantum stuff tends to work. Or maybe we'll stumble upon tachyons only to find them useless for this sort of thing.