Siri today is built on what’s essentially completely different concepts from something like ChatGPT.
There are demos of using ChatGPT to turn normal English into Alexa commands and it’s pretty flawless. If you assume Apple can pretty easily leverage LLM tech on Siri and do it locally via silicon in the M3 or M4, it’s only a matter of chip lead time before Siri has multiple orders of magnitude improvement.