It's less useful for individual components - I can already represent those with pads without affecting readability of the schematic too much. But I sometimes would like to carve out a chunk of stuff onto a separate board, and connect it with, say, a ribbon cable, yet keep it on the same schematic sheet, or at least within the same project. That is not doable in KiCAD 5 at least.
Comments
It's less useful for individual components - I can already represent those with pads without affecting readability of the schematic too much. But I sometimes would like to carve out a chunk of stuff onto a separate board, and connect it with, say, a ribbon cable, yet keep it on the same schematic sheet, or at least within the same project. That is not doable in KiCAD 5 at least.