Mass Assimilated Tech

A Mass Effect Universe where the Inusannon (the species before the Protheans) used an incomplete Crucible as a last-ditch attempt to destroy the Reapers. It destroyed all mass effect technology within 500 light years of the Orion Arm, including the Sol system, destroying the Reapers and Mass Relays within. Humanity had to grow without Protean archive/ezzo FTL. Better sum inside.