Antidiscontinued Feature

An antidiscontinued feature is the reverse of a discontinued feature. Discontinued features are features from older world can have but newer can't, opposite to this, antidiscontinued features are features from newer worlds that older worlds can't have. These were most prevalent in the survival portions of the classic and indev eras of Minecraft because of the limited area of the world. However, they technically still exist now just in much more extreme form. The reason is that the Minecraft world still is limited in size and so if the player were to load all of the chunks in a world they would lose access to any future additions. Loading all chunks in a world has never been done and would take a ridiculous amount of time. But if theoretically, a player was to load all chunks before 1.13 for example, the world would never get a heart of the sea or conduit because these need to generate in a buried chest in new chunks.

Examples
WIP