Initially I was against it too but have found it to be good for compartmentalising work over time.
Still, I've seen more than a few workplaces that still use pre-ribbon era Office [0], and haven't upgraded because the employees hate the ribbon...
[0] ...on Windows XP, with 12+ year old hardware... the horror!
The reason was that the existing interface was so overloaded that the Office team was regularly getting feature requests for things that that already existed in the apps for years.
In a personal note, with the ribbon interface more than once I've had to google where a certain functionality ended up, which I could easily find in the old UI.
Why can't Microsoft implement an optional menu bar? It's ridiculous.
Not available from Microsoft, but...
https://www.raymond.cc/blog/add-classic-menu-to-microsoft-of...