Galahad
Regular
I got the impression that the gates were left alone 'cause they were created by some ancient race or something, or at least most of them.
Either way, they'd still want a way to get to Epsilon 3. There is the Great Machine.
I got the impression that the main gate system was as you say built by an older race, but that later gates were built by the younger races to suit their needs. I was waiting for the Great Machine to come up in conversation. Would Draal want visitors in the future?
I wonder if the machine destroyed itself after Draal's custodianship. I wonder if it became a resource of the Alliance in later years.