Fully automated AI salvagers that go off and find asteroids or planets by themselves then dump the stuff in factories with no player supervision I don't really see happening. Imagine if every player on the server had 5 AI miners at hand, all 5 of those going off to mine. That's 5 extra sectors per player loaded, potentially including planets (planets being mined at once). And this could be happening whilst the player is offline, meaning 5 extra sectors being loaded at all times. Per player. All the time. And that's assuming you only had the five, which is... optimistic.
Basically, it's a nice idea but the server wouldn't be able to handle it.
What I do see (and really hope does happen at some point) is having an AI mining team assist you. For example you fly into an asteroid cluster, give the order, and everyone starts salvaging everything in the area. Then when you fly back to base you give the order for the AI to start transferring the resources into your factory whilst you go and grab a sandwich or something. I don't ever really see the AI doing things in sectors that have no players nearby.