Per the inside account of Apple’s issues, Robby Walker, a senior director in Apple’s Siri division, held an all-hands meeting for the team and acknowledged that things were…not great. He acknowledged that team members might feel angry,

Apple has not confirmed if its delayed personalized Siri features were anything more than conceptual when they were announced during the WWDC

Siri has undergone some improvements thanks to Apple Intelligence, such as a new visual cue for when the assistant is active on the iPhone. When talking to the assistant on an iPhone 15 Pro or later, you can correct yourself in mid-sentence without confusing Siri and you can ask follow-up questions.