Cities are a good metaphor. Now consider we want to move some buildings around. Teardown some buildings. Create some new ones. Move a bunch of roads around. We

Cities are a good metaphor. Now consider we want to move some buildings around. Teardown some buildings. Create some new ones. Move a bunch of roads around. We need to think about water supply. Electricity. Where to put the people. Which roads can be closed. How traffic should be diverted. Luckily with software this can be done more easily. We only need to design the new architecture. Design how everything should be executed. Finally we hand over the blueprints and let the computers do all the work. But it's still going to take some time. A process which is largely invisible. The construction yard is there. But everything is code. You can't really take your stakeholders for a tour around all the work that's happening.