Rane7685 wrote...
Quantum entanglement exists today it is a real phenomenon it ddoesnt rely on ficticious mass relays. (Im not saying you said they were just fyi for people that werent aware of this)
It's always existed, it's something we've discovered, not invented. But they're BSing their way through how it can be used, but I'm ok with that.
Well back to rebuilding the Mass Relays. Unless I've missed something most races (with the possible exception of the asari?) don't know how the relays work internally. Everyone has just stumbled over them in the past and figured out how to use them to travel, but actually build and maintain one? I doubt anyone knows how to do that. The key to it would be the keepers (as someone else pointed out) but we only know for a fact the keepers were on the citadel and at least I assume keepers, or a similar race, were on the relays too, but if you picked destroy, well, no keepers left.
And even if someoen could figure out HOW to build one I don't think anyone can actually gather up the raw materials needed to build one without being able to jumpt between clusters, and if they somehow can because they have planets that are rich on the needed materials within FTL travel range they'd basically have to strip-mine them, which might not be wanted when you also need the same materials to rebuild your civilization, and if the planets are the least bit habitable you'd want to colonize them to take some pressure of your "main world" since you'll have to not only rebuild your infrastructure but re-design it, at the very least to support your population until the mass relays are up and running again, which might be a while.