alt Hacker NewsSome features are not meant to be revenue sources. I'd lump assistive technology and AI assistants into the category of things that elevate the usefulness of one's ecosystem, even when not directly monetizable.
Edit: IMO Apple is under-investing in Siri for that role.
Steve Jobs famously said, "If you do the right things on the top line, the bottom line will follow.”
Paraphrased: if you do things with the explicit goal to optimize revenue, it harms your business success. If you do things that optimize user experience and delight customers, it will provide more value long-term.
Voice assistants are in that latter camp, I believe. (And I think of this quote constantly as Tim Cook crams more ads into the ecosystem)