It’s as if you wanted to use Minecraft Chests within Minecraft Chests until the NBT of them Stackoverflows, this takes way too much to happen, and it’s not single specs of dust being saved, it’s “Number multiplied with Dust” per Material, and after a certain Number of Dusts it will definitely get a Hitbox and Collisionbox and even become visible (I might make the Dusts part of the Air Block in that case).
And as far as I understand ECS, Blocks with an identical amount of Dust (and identical everything else) in them will share the same “ID” type of thing. But I will let @OvermindDL1 confirm this or not.
Also I could even do this Dust thing in MC, if it wasn’t that every Block you can place just deletes whatever was previously at the target location… would be much better if the Dust was just pushed around to the closest other Block or something.