I mean, keep in mind, there are WAY more plural cultures or subcultures out there than just the tumblr-influenced one that seems to have spread somewhat to Twitter and Discord. There are still enough soulbonders around, I'd say, that "insourced" is still a perfectly good word to use, especially since it still means something and is therefore useful.

After all, our fictive headmates might be insourced and thus have a different relationship to story than outsourced folks would, but they still have categorical differences from the rest of us!