Software development has been revolutionized by new methodologies and practices. The software industry has moved from sequential waterfall approaches — where software requirements were pre-defined, coded, tested, and eventually released, often years later — to rapid evolutionary development of a minimal viable product, often over a period of weeks or months. The advantage of these new methodologies has meant we can unlock value earlier and obtain valuable feedback with which to test hypotheses and drive future releases.
Not only have the methodologies for building software changed, but the underlying technology we use to construct software has also changed with them. Notice, the word "construct" and not "build." Modern software development has evolved to writing abstract tasks on-top of several layers of abstraction, binding together third-party libraries/APIs and defining a few custom pieces of business logic which define the Intellectual Property of an application.