User blog comment:LDR/Possible Reaper Motive/@comment-4310467-20120224184824/@comment-3325589-20120224213411

I don't buy the idea of Reapers as a threat (or savior) across multiple galaxies. Primarily because on the scale of science fiction civilizations, they're actually relatively low tech. Their military technology (which, given their lifestyle, has to be among their most advanced) is only somewhat better than that of the Mass Effect protagonist civilizations. As in, their ships are pound for pound stronger, but still destructible if the numbers are sufficiently skewed. Meanwhile, the Mass Effect civilizations are pretty low in the technological pecking order, being probably below Star Trek and definitively below the Imperium (or most anybody else) from Warhammer 40k, or the civilization from the Xenosaga series.

On a multi-galactic scale, it just seems too easy for some other intergalactic civilization to come into conflict with the Reapers. Say, the Xeelee from Stephen Baxter's novels, who, if they even deigned to notice the Reapers, would throw a few black holes and supernovae their way and then go back to more important business.