Lets see how that holds in five years time.

I am betting it won't.

By the way, there are OS APIs, I am yet to write a CLI driven agent, as part of iPaaS deployments, which are basically SaaS IDEs.

vi and Emacs are certainly not IDEs, they are programmer editors, although with enough effort they may pretend to be one.

Now I want to see the goal posts for what makes an IDE...

That being said, surely the point here is about "agent driven development" vs "ai autocomplete". As they say, whether you type your command into a web window or a terminal window presumably doesn't change the flow that much.