Well, we've known WHY for a while now. But this new comic gives some interesting details.
Fodder for droid enthusiasts.
Robinson and Harris paint Omri as a bit of a droid Nihilist throughout the issue—he questions why the droids have a concept of one side over the other, or whether they’re even capable of human qualities, like bravery or sacrifice. Most importantly, Omri also focuses on the rarely-discussed, but often uncomfortable, willingness the denizens of the Star Wars galaxy have when it comes to wiping a droid’s memories, just as Bail Organa did to C-3PO after the events of the prequels.

