What do you mean not entirely, sorry?
What I mean is that AI wasn’t used for every part of the development process. The programming language may be over 30 years old, but that doesn’t mean it can’t be used to create an app today. The age of the programming language and the use of AI are two completely different things. AI can assist with coding, debugging, and problem-solving, while the developer still makes decisions, integrates the code, and builds the final product. Using AI as a tool doesn’t mean AI did 100% of the work.