I was forced into an update of Power BI Desktop this morning and for a brief moment I saw a window asking if I wanted to save my changes. And before I could realize what was going on, Power BI Desktop closed without saving my changes and only then I could see an update being applied on the app icon in Windows home screen.
I had to reopen the pbix I was working on to notice some changes weren't there.
I did do much but It would have been catastrophic if that update was to be pushed last week, while I was making major changes to huge models that were taking forever to make because of complexity.
Please make sure to get user confirmation before closing the app to apply updates in the future? Maybe it's a Windows Update thing or Microsoft Store. But either way, please make sure the users know an update is coming and make sure they have time to save changes before closing the app on them!