This is the best summary I could come up with:

Microsoft is working to cram its new ChatGPT-powered Bing Chat service into every product it makes, and starting this fall it will be a built-in feature of Windows 11.

Microsoft has been pulling back on its support for Cortana for years, ending support for the iOS and Android versions in early 2021 and removing it from the Windows taskbar in Windows 11 a few months later.

Before that, Microsoft had already removed most third-party app integrations, refocusing the assistant entirely on basic productivity tasks and Bing searches.

Cortana began life on Microsoft’s ill-fated Windows Phone platform in the early 2010s, where it served the same general function as Apple’s Siri and Google Now (and, later, the Google Assistant): a hands-free way to interact with your phone that also attempted to predict what you'd need next, all filtered through a "cute" "personality."

By 2019, the voice assistant was already being gradually deprioritized in new Windows 10 builds.

Before too long, it may only be possible to hear Cortana in its original form: as an AI helper in the Halo franchise.

I'm a bot and I'm open source!