Inexplicably absent from the update notes is a really big fix that has been asked for for years: A model card now lists every ecosystem it has a version for (except Anima because it doesn't have an abbreviation. Such an odd commission since it seems to easy to fix), and searching filtered by base model finally find models where the filtered system isn't the newest model.
While this is the primary reason I always published new ecosystems as their own model, I don't think I'll switch over to using different versions for different base models: I've got over a hundred separate Pony and Illustrious models that are separate, most with significantly altered tagging+training data that merits a description change, and the trainer's publish wizard has no way to post directly to an existing model (I keep a local copy of everything I make, but it's enough pointless extra work to upload the file I just DLed I'm not doing it unless I have to). Still this is great for anyone who isn't super invested in a current organization method.