Not sure. People are saying "Siri" but complaining about space utilization which I assume is for the foundational models. Those are used pervasively, and are exposed as a resource for third party app usage as well.

Apple's goal was to have a set of foundational models to discourage proliferation of small bundled models in first and third party software. So ironically, they exist to try to save people disk space.

My guess is that iOS, iPadOS and macOS are converging on some points, and Siri gets included.

It would be interesting on macOS if it had amazing computer use and was able to control all aspects of all apps, and you’d be able to instantly do anything with voice only.

Siri Actions are one tiny step closer to that, but we’re pretty far away from this.