Apple originally planned to power Siri with ChatGPT under the hood. They quickly saw that other models, including open-source ones, were closing the gap fast.
A few months ago, MCP-style tool calling seemed like the clear standard. Now even Anthropic is shifting toward "code-mode" and reusable skills.
For Apple, reliable tool calling is critical because their AI needs to control apps and the whole device. My bet: Apple's AI will be able to create its own Shortcuts on the fly and call them as needed, with OSA Script support on Mac.
Sadly, much as I love AppleScript, I think Apple giving it any love at this point in time is likely to be a pipe dream. Much more likely they're just going to try to beef up Shortcuts support across the board.
One of the reasons I'm heavily biased towards actual Mac native apps is that supporting callback URLs and Shortcuts unlocks so much of what I might ask of an AI tool already. Ironically I often ask AI assistants for line by line steps to create Shortcuts when I need them because actual Shortcut naming and properties can be quite obtuse.