There are two cases where a “don’t craft” flag (or container?) becomes useful:
1) sorting the items with different criteria -> preference is lost
2) putting the item at the end of the list, then collecting more from the same type (e.g. branches) but they are not “exceptional”. If I want to keep the exceptional one I have to regularly move it to the end of the inventory or put away in a chest. (I was using this second option after playing enough to be able to build one.)
