Nice

上出来！

If you want to discuss running this game I would head over to the FE speedrunning discord (linked in the three houses page) because we are currently planning out a run and nobody has attempted a serious run yet

Probably just because that was the meta from the beginning and nobody wanted to bother to do a run that ends on chapter 20, since doing the good ending only ends about 10-20 minutes after that. The run, at least for English runners, doesn't seem popular enough for anyone to have tried or suggested otherwise but I'd imagine somewhere on nico or wherever that there are Japanese runners who have done a run that ends on chapter 20.