I wish more was being invested in AI autocomplete workflows. That was a nice middle-ground. But yeah my hunch is "the old way" - although not sure we can even call it that - is likely still on par with an "agentic" workflow if you view it through a wider lens. You retain much better knowledge of the codebase. You improve your understanding over coding concepts (active recall is far stronger than passive recognition).
AI autocomplete sucked. Everyone quickly moved on because it is not a useful interface
In some codebases, autocomplete is the most accurate and efficient way to get things done, because "agentic" workflows only produce unmaintainable mess there.
I know that because there are several times where I completely removed generated code and instead coded by hand.