This was it. This was the graduation. It is language and brevity of the tweet that mistranslated plans of coming back. The only way haatons will ever meet with haachama again by coming across the videos decades later either by algorithm or that feeling of "what was that thing again? that was so fun back in the day" Other hololives don't mention her because they agree with her decision. If another chuuba had to delete their shit for reasons out of their control, they would do the same.