I’ve been testing the LibreOffice (and OpenOffice before that) literally for two decades now.
Every single time I gave up using it because of a bug in one single thing a word editor should be able to do in the very first place: displaying text!
Drag-selecting text over multiple pages would distort it, add white lines, deform it or even delete entire lines.
For me this is a very serious bug that has been present forever and should be fixed before making any further developement.
Take a look at my screen grab below: