Why haven't Andromedan species come to the Milky Way?

I wrote about this in another thread then realized that was the wrong thread to talk about it so I have truncated it and placed it here:


I APOLOGIZE FOR THE WALL OF TEXT
I must forewarn this contains my PERSONAL take on the "true" backstory for the Reapers and how it plays into the Mass Effect: Andromeda story. NONE OF THIS BETTER BE CANNON:

I personally believe that the purpose of the A.I. to go to the Andromeda is actually a three fold plan:

The reason to go to the Andromeda Galaxy is not just to establish a "new home" for humanity but also to serve as a recon mission looking something specific (more later) as well as a beachhead for a possible alliance with the Milky Way races (granting they still exist).

What is that truth?
That despite what was shown/told in ME3 that the Reapers are actually from the Andromeda galaxy (AND NO THEY ARE NOT THERE NOW). The Reapers fled to Milky Way after engaging in a war with another native race of the Andromeda galaxy. A war in which they lost completely -only those few who fled survived -those in the Andromeda Galaxy are dead. That ghost boy (he doesn't even deserve that credit) is a last "remnant" of the original AI programing that original fleeing reapers set up that not only turned them into shrimp beings(only credit they get) for these cycles but has by now so far degraded or fragmented -since the Reapers more likely than not have been at this cycle over millions of years (that many minds in one construct? who would not go insane?) that all of which the apparition has stated -while sounding intelligent is insane rhetoric.)

This also explains why the Reapers experiment on the young races of the Milky Way and why they implement Element Zero Technology (Sovereign said it himself 'our technology'). For the Reapers it is known can not use Element Zero themselves directly. So they experiment on the native races to get them able to use Eezo and thus Biotics and then once that is done they invade and convert them into more of their own kind in the fantasy hope that they can do this often enough and gain enough numbers to go back and combat the enemy that utterly nearly destroyed them.

Why would the Reapers flee an enemy so powerful and experiment on young races then convert them and add to their own number and then when sufficient numbers go back in revenge? Simple. In this war the Reapers enemies had one massive advantage. The Reaper enemy was so powerful not because they outnumbered the Reapers but this species/race/enemy of the Reapers could use biotics not only as organic beings but also in their buildings, ships and constructions. (Imagine a star ship powered by biotic interaction alone). Remember the Reapers can not do so and is one thing they been trying do with their experiments.
Still In doubt? Look back to 2015 launch trailer in which that building ... unfolds...it sure looks like biotic energy.

Furthermore why do the Reapers stay in dark space relatively close to the Milky Way and not head to the Andromeda galaxy and invade it as well?
Simply they are afraid of encountering their enemy before they are ready (a time that will never come due to their stagnation as a species).

Why do those Reapers we have encountered act like they have existed before our galaxy ever existed?
Because they are not from our galaxy at all. It shows why they care little for our galaxy to them it is petri dish; it is not their home. Not to mention our galaxy is bit younger than the Andromeda.


NOW TO HOW this plays into Mass Effect Andromeda.
I believe that ME:A is going to start with a discovery mission of somekind. The info gathered from that mission may not be told directly to the player character. We will know kinda what it deals with since most likely it will be the mission in which you control the Father Character. After which the knowledge gained is analyzed and the A.I. begins since those behind the discovery mission probably will made up of the rich elite who want to survive (they are businessmen and they being doomsayers want the option of fleeing should the Reapers prove to be true after all). This leads to Arks creation and the launch to the Andromeda. The 600 year time frame may actually have another reason: while in cryo any genetic modifications could manifest to full potential while the person does not age; where as if they were awake the whole time they would never live long enough to have access to full range of their genetic modifications. Something goes wrong... maybe that mass effect projectile that skimmed that world thousand and thousands years ago hits the ship and starts the revive process early. Whatever the cause and effect the mission may start as a mission to find humanity another home but the father disappears off on his mission in a search of the enemy of the Reapers and trying to make allies with them ... hopefully not making them into another enemy. Should the mission be successful then making an alliance with them against their enemy the Khet. And thus when encountering the enemy of the Reapers or the few native reaper environments we may hear that this at one time belonged to the reapers or a 'remnant' of what the Reapers did leave behind.

I may be a universe off the mark but at least it is an interesting idea. But again like I always say: To Each Their Own.