30 years of their home name Office brand, known by pretty much every person that's ever had a computer let's get rid of that, and make the unreliable bullshit generator the main brand instead certainly a courageous decision
That was my line of thinking as well. The article pointed out that they rebranded to Office 365, then Microsoft 365 and now Microsoft 365 Copilot. The thing is, no one ever calls it anything but Office, maybe Office 365 if they're being real fancy and specifically want to refer to the subscription service.
My take is that Microsoft assumed that everyone is calling it Microsoft 365, which they don't.
30 years of owning the term "Office", having almost every single person who ever touched a computer know that Office is the Microsoft office productivity suite, then deciding that a sort of working, but yet to be 100% defined LLM is more important. The fact that no one stopped this or that shareholders aren't pissed tells you something about how absolutely broken modern computing is.