Thought experiment: what if you used AI in the sort of situation where you would consider adding an external dependency? The differences between the two are obvious, but the level of delegation is not that different.

One difference is that you can (typically) keep on banging the prompt hammer until the problem stops twitching. That might make you want to delegate more.

That in turn might make you refactor the project with more, larger delegated areas. Increased delegation is one recently-added difference between programming and software engineering.