Folders or Tags for inventory items

This is more of a want than a need, but it would be nice if we could categorize inventory items using tags or folders. I do phone repairs, and have a lot of parts for the same phone, and even variations of the same part. It would be nice to be able to categorize them in folders and subfolders such as
iPhone → LCD → Red

Again, nothing I necessarily need, but I think it would be a nice thing to add when you get to the polishing stage. Loving the software so far!

Let’s say you would tag all your inventory items, how would that feature help you? I’m not patronizing, just asking for the use case so the feature is implemented with the real purpose.