With ACP, it allows for any provider you choose.

Cool, I'll try this today.

IntelliJ still provides the features you've listed. However, the developer workflows have changed quite a bit, and the tools have to adjust to that.

Right, and those features are deteriorating though it should be opposite as it becames more important now

It is a broader story than just the IDE integration. That's important, of course, but the post talks about agentic development across the IDE, teams, and organizations.