This would require off device processing that Apple doesn't do as a "benefit" to users for privacy.I couldn’t care less about having a chatbot, but I would welcome Siri getting better at understanding what I’m asking for and being able to actually remember context. Asking for specific music is such a chore when artists spell their names or song/album titles weird, have live versions, etc.
Apple should allow Google to let Google Assistant use those API frameworks - it actually works. Privacy phobes can just use the stupid one, er, Siri and swear a lot.