So when we were talking about mixed origin systems the other day with our friends we realized(at least for us) we kind of treat origin labels similarly to role labels. They are terms many of which are community based that help organize alters to better understand them. To know which types of situations are most likely to effect them or which they are most equipped to deal with. (We will be using alters in this for ease but many of our alters that don't identify as trauma formed tend also not to use the term preferring headmates. Not relevant to this post but I know some will care so thought I'd add it.)
To us identifying with an origin other than trauma does NOT mean that trauma couldn't have played a role in how the alter was formed. Most of our alters that don't put themselves in the trauma formed category still understand which parts of our trauma most likely played a part in their formation even if they don't feel connected to it at all. For example our neurogenic headmates... obviously our experiences with our disorders is and was traumatic on so many days but they see themselves as closer connected to the symptoms of our disorders than to our trauma so it's still beneficial for us to have that separation to better understand the different experiences both types of alters have and how they will interact with different situations.
We also literally have a origin folder labeled syscourse for those whose formation was directly related to distress we experienced in any way connected to syscourse. Because it helps us when we are triggered and making quick decisions to have alters categorized by what parts of our experience they are most connected to so we know who is most likely to be triggered and who is most likely to help.
It can also be more beneficial than roles are because it can help us categorized both the ones that help and hurt together to make things easier. An alter that's an autism symptom holder and will obviously make symptoms worse and an alter that formed to be an autistic mask can be found right next to each other so on days when we are struggling with autism we can go to the neurogenic folder and go through who we are going to try to prevent from fronting and who we are going to try to get to front all in one place. Because going through all 88 profiles and trying to remember who is who when in distress is a freaking impossible task and having alters split by origin labels helps us with this so much. It wouldn't be worth it to label alters in this way if it didn't help us significantly.