That post seems to say that the unit of work must be something customer facing. It even qoutes Kent Beck talking about "Weekly delivery of customer-appreciated value".

There is so much great software in the world that wasn't delivered like that and couldn't be delivered like that: Unix, Microsoft Word, Postgres, AutoCAD, The JVM, Google search, Windows, AWS, Robotics, Calculators ....

The software industry seems to have been captured by contractors who used to deliver CRUD apps and now want to make the whole world in their image and likeness.