Not OP,
In my experience apple's ML on iphones is seamless. Tap and hold on your dog in a picture and it'll cut out the background, your photos are all sorted automatically including by person (and I think by pet).
OCR is seamless - you just select text in images as if it was real text.
I totally understand these aren't comparable to LLMs - rumor has it apple is working on an llm - if their execution is anything like their current ML execution it'll be glorious.
(Siri objectively sucks although I'm not sure it's fair to compare siri to an LLM as AFAIK siri does not do text prediction but is instead a traditional "manually crafted workflow" type of thing that just uses S2T to navigate)