Earlier quoted context omitted.
LibreOffice should have provided a theme/icon pack "Office Icons" - half the time I can't tell what an icon is for because most of us have been raised on MS Office. Also, it would do well with a "Simple" mode ala Google Docs that is sufficient most of the time for most folks. Otherwise it works fine, haven't had any issues with the documents it produces and I particularly like the direct export to pdf feature.
LibreOffice has several themes that makes it look like MS Office (e.g. ribbons, modern UI, etc). Select TOOLS > OPTIONS > ADVANCED > Enable experimental Options (WARNING this is experimental and may be unstable) > OK and then RESTART LIBREOFFICE. On restart VIEW > TOOLBAR LAYOUT > NOTEBOOKBAR. You can then play with the options with VIEW > NOTEBOOKBAR > CONTEXTUAL GROUPS/ CONTEXTUAL SINGLE / TABBED.
This is a perfect example of actions that make adoption harder. This should have been at most 2 clicks and prominently displayed assuming LibreOffice wants to be a great alternative to MS Office and make the transition easier. I have been using Linux daily for over 20 years now and it is not intuitive to me - it doesn't make me very optimistic about the experience for a new user.