Devil's advocate: Doesn't HN frequently tout "moats" - isn't this a moat? What is the practical difference between a moat and vendor lock in?
As architects of businesses, we want highly-demanded, easy to produce, high-profit products, so we won't have to work so hard for a great life.
Vendor lock in is a moat created around the customer, so that they find it hard to switch even if someone else in the market is offering a better product.