I have many issues with Siri but adding things to the reminder list across the family works fairly seamlessly for me, now that my wife has given permission in the 'home' app to use personal requests.

That said, my 11yo daughter said to me yesterday "why don't they just add AI to Siri" after failing to get Siri to tell her how long a timer was originally set for (Siri would only tell you how much time is left on the timer).

Someone did build a crazy ChatGPT-to-Siri bridge through Automations which I haven't tried yet but plan to at some point...