> This will be first time they charge for Siri - a product that doesn’t garner any positive reviews.

It seems like revisionist history to say that; lots of people were sold on iPhones years ago because of Siri. They have one of the few business cases for voice assistants, which are notoriously difficult to actually monetize, that actually makes any sense, since "selling iPhones" is meaningful and "selling a subscription" would be nice on top of that.