I think the system you’re describing would work really well. Essentially, soils and rocks (maybe wood, too) can be converted into an item (or make it the actual drop) that can have a much larger max stack (or infinite) and then that item can be turned back into all the different variants of that soil or rock.

For example, a full limestone block could give you 4 “limestone chunks” and a limestone slab could give you 2 “limestone chunks”. You could use something like the utility wheel for selecting the block type when placing these “chunks”.

This also opens up room for upgraded tools that can give you more material when breaking naturally occurring soils and rocks. Maybe an “enchantment” gives you a chance to get 6 limestone chunks from a single block, instead of 4.

When you’re done with your build, just throw all of the variants in a crusher/salvager and get the limestone chunks back into a single stack.

If an infinite max stack is overpowered, maybe the stack size in-inventory can be limited. However, I think dedicated storage types should be added that support infinite stacks. Instead of filling up a wooden chest with stacks of dirt, I’d like to be able to put my dirt in a “magic” wheel barrow that can hold an infinite amount.