If there had been consumer good will for voice assistant performance before poisoning the name, it might have survived... but when you first product in that realm is garbage and it lingers for a long time, you're dooming the name.
Also, synergy with Halo is meaningless to Microsoft. Most folks do not care or even know about Halo.
If I recall correctly, the thing that made Cortana particularly frustrating and worthless is that it did all searches using Bing, and opened any websites using Edge, regardless of your default settings. You got forced to use all the Microsoft version of every tool, even if you didn't want to.
And to Apple, Siri is to Siri AI as MacBook is to MacBook Pro.
Completely different product.
Asking for Siri is like an automatic reflex to a lot of people. You can’t change that name.
I don't know anybody who uses Siri for more than just setting an occasional timer or something. Usually it's a nuisance when she is accidentally activated and takes over the interface.
Man effing hell Apple
Siri is still subpar despite leveraging third party AI. What a genius move.