Interesting. As we get closer to the release date for Chapter 5 we are reminded that Chapter 6 is right around the corner as it comes out in theaters 18 days after the Blu-ray for Chapter 5 does. With its own BD coming out six weeks after that followed by a rapid one month for Chapter 7 then its BD by the end of September.
All the while the episodes come out on TV weekly in Japan.
Yamato 2199 might not be able to beat Evangelon 3.33 or Gundam Unicorn these days, but it hold high respectible sales verses other modern anime.