They're just now hiring for this? What have they been doing... for the last several years? As a commentor above mentioned and I never really thought about it that way: Jobs had a Siri strategy because he knew the future of computing was AI+conversational. That was iPhone 4S IIRC. And they've absolutely screwed that opportunity since Siri has not improved much since that original release.
And then we have Spotlight. How old is that? 15 years? What another missed opportunity to ship AI builtin to that search feature.
IMHO, Apple is rotten from the head down. Tim Cook is not a technologist, and I doubt he barely even knows how to use a computer. How can you run a computer company if you don't fundamentally use or understand it? There's no more chief product people at Apple either. It's all just milquetoast meetings and personalities: No one is allowed to touch the guaranteed cash monster, which is iPhone. So they do small changes here and there, and everyone from the engineers to the SVPs are just collecting their paychecks and watching that AAPL grow to $3T valuation. This is the current state of affairs everywhere, including Google. Sadly, there's no competitors in the smartphone space besides Android as an alternate OS which is its own mess. So until something comes along at that scale and is able to dethrone the big 2, its going to remain this way I'm afraid.