> LibreOffice does have a reasonably comparable feature set

Pile up all the features Office has but LibreOffice doesn't on one side, pile up all the features that LibreOffice has but Office doesn't on the other. What pile's larger?

It's kind of a pointless argument over whether or not LibreOffice has ENOUGH features; enough features for who? It's a global question with local answers. It's pretty easy to count who has MORE features, though, and Microsoft Office wins there.