For me?
I can have a variety of chests on the map at some Inn where the characters base is and they can put things in and take things out that are persistent for the campaign.
I can have a hollow tree trunk token out in the woods filled with loot that can be taken or placed back in for storage.
I don't have to EVER track a parcel as part of a story because it will be part of the map and I'm essentially a lazy DM and this was my primary driver for writing this.
When I customize an NPC I don't have to keyin or cut and paste a weapon or armor or any other item, I can just unlock the NPC editor and drop the item straight on the sheet and it will be ready to use AND in the NPC's inventory (which of course means it can be dragged in and out of things like map parcels other characters other NPCs).
With polymorphism and this I can have my players have pack animals or NPC carts, all with their own inventory so that things are properly tracked and you have it or you don't. Storing things in map parcels at home base that don't fit on the pack animals - which of course means I DON'T HAVE TO TRACK ANY OF IT AS DM....
Lazy DM - completion :)
I'm sure there are other things other people can think of with just the raw mechanics I'm providing.