Maybe they just don't know any better

Apache OpenOffice??

Surely you meant LibreOffice. OpenOffice has basically been dead for years, with no significant work going on.

LibreOffice has been updated? Interface still looks like it was designed for Windows 95.

It still looks and behaves like StarOffice.

The templates they include look ancient as well. They do have a mediocre copy of Microsoft’s ribbon interface.

I mean, there’s no such thing as a good copy of Microsoft’s ribbon interface.