The thing with “just works” in monopolies is that it eventually stops working
This gets accelerated when the company starts changing the product just for the sake of having to change something to meet some OKR, or because they need to find a way to incorporate the newest marketing buzz (cloud, AI, etc).
The Office suite was simple to use and performant. Nowadays I watched a college professor struggle for 8 minutes trying to figure out how to save a file locally rather than saving it to OneDrive, because they redesigned everything around that. It also takes an obnoxiously long time to launch, it keeps popping up some Copilot button in inconvenient places too.
That's not entirely true. It's true that Microsoft invested in Apple, but it's not true that they were about to get broken up and that Microsoft money saved them.