alt Hacker News> Now, suppose you order it from Amazon.
You do not order electronic parts from Amazon. You order them from Digi-Key or Mouser. They're organized to ship efficiently from a huge inventory of small parts, and they buy directly from manufacturers, so the supply chain is solid. If you order a Panasonic resistor, you will get a Panasonic resistor, not some random floor sweepings. (This does not apply to DigiKey's "marketplace", which is third party resellers. DigiKey does claim to monitor their resellers, and DigiKey, not the reseller, handles customer complaints.)
I was just using Amazon as an example, mainly because they deliver their own items from local warehouses, usually. Easier to think about comparing that to driving to the store yourself.