The problem will come when LLM driven assistants become more popular. There's no way to have a nice one on iOS without Apple giving up more control than they're willing to.
Apple will make an exception if it's in their own interest. They also have enough money to just buy out a company and airlift them in. If there's one company that could stumble around for 20 years and still have enough money to continue without much worry, it's them.
Apple should remember from its Maps debacle that it's difficult to make up years of product tuning overnight, no matter how talented a team you have.
Time >> talent
Because everyone has talent within the same order of magnitude, but no one has invented a time machine.