The Angry One wrote...
Synthesis is domination of the Reaper ideal. Not understanding.
The Reaper ideal is to Harvest the galaxy before organics can create a synthetic race capabel of extincting them, this is no longer in effect post-Synthesis. Seriously, watch the Synthesis epilogue - you will notice several Reapers and none of them are slaughtering everyone. EDI even mentions how they become part of the galactic community.
There is no organic life. There are only hybrids. Approved by the Reapers. LOOK at them for heaven's sake, don't tell me they aren't changed.
Glowy-magic is not robot parts, it doesn't make us part-machine any more than biotic abilities make us part-blackhole. You'd make a better argument saying most people already were hybrids, because they wear technological armour, fly around in technological ships and generally live surrounded technology. Synthesis facilitates that relationship, it doesn't OMG half-a-toaster or whatever silly meme you imagine.
They are hybrids, regardless of the method. Also, look at husks. Reapers have been doing this for billions of years in a smaller scale.
Husks actually do replace many (most?) biological systems with technological ones, in fact if you look closely you can notice many metallic parts that are not present when humans are Synthesised showing there is a difference. You will also notice that husks don't seem to exercise free-will prior to Synthesis; whereas post-Synthesis beings do.