The answer is simple: use the pets to ride between gates.
I'm gonna accept this as the only viable answer.
Not sure if I count using a mount to move through dungeons/missions "traveling" in the long-distance sense.
Is like saying, since we've got airplanes, we don't need cars anymore.
I also find myself wondering why we haven't started selling planes instead of cars and making driveways into runways. It's 2013, where's my aero-mobile or flying cars?