>>73522368That's not really how it works, her Live2D model has nothing to do with her inner workings (I don't understand why so many people have this misconception). The Neuro we saw during the re-debut is the same Neuro we saw during that 12 hours dev stream right before the re-debut.
Neuro had many updates from December to May, while using the same, old model, and that didn't suddenly change because a change in her Live2D model, that's why your analogy of save files doesn't really work. The Neuro from pre-ban January is different from post-ban January, and that one is different from say, the Neuro from the first family collab during April.