Board Thread:General Mod Discussion/@comment-90.202.70.71-20151107123425/@comment-26208590-20151107145727

Sinthoniel wrote: Mevans should think about raising the world height limit... "Well, building the Tall Worlds Mod required gutting and entirely replacing large portions of the Minecraft engine. Namely, the entire chunk loading system and a fair bit of the lighting system. Since these changes are rather large, there isn't much benefit to using a modding system like Forge which has essentially no APIs to help with something like this."

(From the "Tall Worlds Mod" Creator)

--> I think this will never happen until Forge changes massively