[analog31]

The best thing about self checkout is the parallel stations, so that getting behind a single black swan customer won't set me back by half an hour.

In some cases, shifting work to the customer is a net positive, especially if the customer can estimate their own time and effort better than they can estimate and manage someone else doing it. Nearly a half century after The Mythical Man Month, managing software development is still widely agreed to be an unsolved problem.

The cost of software development is not just the time and effort, but the existential risk to your own job or business from its unpredictability. This is why I do all of my own programming, and also most of my own home repairs... and use the self checkout at the supermarket.

It didn't displace developers because the industry has grown to absorb them. In my own case, I use my programs to get my own job done, then hand the whole thing over to the project team, and the developers write the production code that ends up in the product... but not at my expense.