Microsoft has killed off Cortana... partially
When digital assistants are mentioned, it tends to be Siri, Google Assistant and Alexa that come to mind; it is only for real Microsoft diehards that Cortana features.
So it is little wonder that Microsoft has seen sense and decided to kill off some implementations of its own digital assistant. Cortana will still be found in Windows 10, but mobile users will find that it is no longer available for either iOS or Android.