[kg4lod]

That's a really good observation!

We think GetScale works great for anything that:

(1) Is valuable enough to warrant a serial number (unique ID)

(2) Has unit margin of at least a few dollars

(3) Is complicated to build or inspect, or has to be held to an extremely high aesthetic standard (e.g. luxury goods)

That covers almost all of your examples. One counter-example might be T-shirt manufacturing.