Interested as I have a basement full of stuff in questionable order.

Could you explain a bit more? If a box in the basement box is marked with 4 emoticons, how does this help you understand content, context, history of it?

I can imagine a QR generator for "obsidian://" links, which would open tagged locations, could be very useful, to identify contents of boxes without opening them.

If the codes are written by hand, then typing them into UI and manually searching for them could be tedious.

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Emojis/Random Images on boxes, could be used to quickly, visually find the right box in a sea of identical gray boxes.