Siri is far behind current AI assistants. Any roadmap for real improvements?

I use Siri daily on iPhone and Mac, and it fails at basic things:

It doesn't understand follow-up questions or context. For most questions it just shows web results instead of answering. It misunderstands simple requests, and I have to repeat them. It can't chain two actions in one request.

Meanwhile, other AI assistants handle all of this without problems. As a developer and daily user, I would like to know:

Is there a public roadmap for Siri improvements? Will developers get better APIs to make Siri useful inside our apps (beyond App Intents)?