The original poster is Desertshadow.
Placing objects in MapEditor appends to the end of the list. This causes chronological order (oldest on top -> newest on bottom) during a mapping session.
Saving in MapEditor stores that list in a JSON file, under data[]. But the order is scrambled/destroyed.
You can make a pseudo prefab, by selecting A, B, and C in the list with Shift + LMB during chronological order. But when A, B, and
C are spread out in random locations across 3000 objects, the pseudo prefab requires manually selecting each object in the world.

The original poster is Desertshadow.
Placing objects in MapEditor appends to the end of the list. This causes chronological order (oldest on top -> newest on bottom) during a mapping session.
Saving in MapEditor stores that list in a JSON file, under data[]. But the order is scrambled/destroyed.
You can make a pseudo prefab, by selecting A, B, and C in the list with Shift + LMB during chronological order. But when A, B, and

C are spread out in random locations across 3000 objects, the pseudo prefab requires manually selecting each object in the world.