Why did MS close Cortana?

Cortana, as a digital assistant, was launched in 2014 as a competitor to Siri and Google Assistant. Initially, Microsoft invested heavily in promoting Cortana, and it was integrated into Windows 10, Office, and other Microsoft products. However, Cortana never gained significant traction, and Microsoft eventually toned down its marketing efforts.

As for Copilot, it's a newer AI-driven feature integrated into Microsoft's Office applications (like Word, Excel, PowerPoint, and Teams). It leverages advanced AI models (including those from OpenAI) to assist with content creation, data analysis, and more. Microsoft is heavily investing in Copilot as part of its broader AI strategy, positioning it as a core productivity enhancement rather than a standalone consumer assistant.