Let's be very real about Siri... it is a sad implementation of what has a lot of potential.

Talking to my HomeKit, turning on and off lights, sometimes, other times, "I don't know what lights you are talking about", "I can't find those lights" even though they're visible and reachable and controllable about the app.

"Do X" "Okay", "Do [very very similar synonym for X]" "I don't know what you're talking about."

CarPlay and Siri, unless you make sure permissions match, with CarPlay giving you navigation, press the Speech button, "Find me the nearest Starbucks." "I'm sorry, I don't know where you are".

It has nothing to do with "not being in the LLM laboratory business". I get, and agree with that. But Siri has been around for 14 years at this point and is barely more than a simple voice control for alarm clocks and timers and "play music", at this point.