Eltab
Lord of the Hidden Layer
Who built the legacy Gates? Were they built between regional capitals? Very important worlds? Potential (future) colony worlds? Was the network "finished" or just begun or still under construction when the effort stopped?
Look up US road atlases from the 1950s to 1970s - as the Interstate Highway system was being constructed - and see what went in first, early, later, eventually.
Sol-like yellow G stars are not that common in the galaxy but M-type red dwarfs are. If the Gatebuilders came from a red-star system, their Gates may not go to anyplace a human would consider a "prime real estate" habitable world.
So like Traveller, reaching Barnard's Star turns out to be more important to human history than reaching the maybe-inhabitable planet current-era scientists think orbits Alpha Centauri.
Look up US road atlases from the 1950s to 1970s - as the Interstate Highway system was being constructed - and see what went in first, early, later, eventually.
Sol-like yellow G stars are not that common in the galaxy but M-type red dwarfs are. If the Gatebuilders came from a red-star system, their Gates may not go to anyplace a human would consider a "prime real estate" habitable world.
So like Traveller, reaching Barnard's Star turns out to be more important to human history than reaching the maybe-inhabitable planet current-era scientists think orbits Alpha Centauri.