A better analogy is a tapestry. Developers are like weavers, threading designs line by line on a substrate. Some task like "add a leaf to this flower's stem" ca

A better analogy is a tapestry. Developers are like weavers, threading designs line by line on a substrate. Some task like "add a leaf to this flower's stem" can be done incrementally, but others like "move the flower one inch up" require unweaving the whole design and rebuilding it from scratch.