Why Don’t They Build Cars in Sprints?

If continuous flow assembly is the preferred way to make cars, then why not software?

Rolling out the latest features for review, with stakeholders waiting for their first look | Source

Have you ever seen a car assembly plant that produces cars in discrete Sprints that begin and end? As in, at the start of a two week period, the team commences to build a new batch of cars, and completes only those cars by the end of the Sprint? No new cars…