Several reasons.. One is that they support dark theme backgrounds (in LibreCAD I can't see the icons), another is the...

Commenting post 518: Several reasons.. One is that they support dark theme backgrounds (in LibreCAD I can't see the icons), another is the two-letter keyboard shortcuts that "bypass" the annoying tool sequence (polyline tool -> select which type of polyline -> select which type of snap, now finally you can draw), and a third one because the QCad author got very pissed at the time of the LibreCAD fork, and decided to stop publishing QCad as open-source, then he changed his mind and QCad became open-source again, and I like that the guy struggled against the odds and keeps firmly on the open-source path while trying to make a business of it too, that deserves some recognition too...