Parmigiano-Reggiano makers are putting edible microchips the size of a grain of sand into their 90-pound cheese wheels to combat counterfeiters::Italian Parmigiano-Reggiano makers are using microchips to verify the authenticity of their products and thwart scammers.
Most commercial non-crypto blockchains I’ve seen only have a couple of nodes connected, usually held by a single entity. In these cases it’s no less centralised than any alternative write-only DB.