We've had macro expansion since the 80s. If your IDE can't autocomplete, then it's a text editor and not an IDE. Which makes it an irrelevant question to ask, because it has no impact on making something feasible or not.

Of course, brother, that’s the point. And while oldies one by one get to pair their IDEs with RAG+LLM autocompletes, some brothers keep raging against people using higher level code assistance.

Which is both ridiculous and also very agressive.