Do you remember how all the reincarnations of Hieda no Are died at 30 years old, and Hieda no Akyuu became a weird case because she reached 30 a couple of years ago and hasn't officially died yet?
Well, the events of Touhou 20 might provide a solution to Akyuu's predicament, along with an out-of-universe reason why ZUN kept her alive a little beyond her expected lifespan. But this involves entering Spoiler Territory, so I'll go into detail under the Read More.
In the official manga Forbidden Scrollery, it had already been established that Akyuu prayed to Iwanagahime for longevity, and the previous reincarnations of Hieda no Are were probably already doing this as well. Those prayers were seemingly being ignored, and with the debut of Ariya Iwanaga in Touhou 20, we're discovering why: Iwanaga had been sealed for a long time by the Lunarians.
With Iwanaga now being free once again and Akyuu having somehow managed to delay her eventual demise for long enough to witness this, the tragedy of the Child of Miare could finally be avoided, and both Akyuu and any descendants/successors she may have could finally get to live long and prosper without sacrificing their passion for recording history.
(And those annoying "Akyuu's funeral" memes would be rendered obsolete)
(And Akyuu X Kosuzu would no longer be Doomed Yuri)
