I don't really mind that they aren't on the LLM bandwagon, but Siri seems to have stagnated. The big "Apple Intelligence" capabilities of the iPhone 16 haven't exactly landed. The Vision Pro seems to be on at least a partial depreciation path.
The only real innovation I've seen in the last decade has been the M line of chips. Mind you, these are undeniably really good; but even that hasn't changed the market share that much (though it is going up and trending well).
This is what bothers me about most voice assistants, I think maybe the Amazon one finally got an upgrade to modern LLM capabilities? I don't know about the Google one.
I assume the cost is too high, but I don't expect ChatGPT / Grok / Claude level of knowledge from a voice assistant LLM, if they can run a drastically small enough model that doesn't cost an arm and a leg at scale, I would be okay with that. Definitely would have to cache some of the responses when viral events happen.