GTK3 has the best integration, it now uses native widgets and elements thanks to the work of Caolán McNamara (it is hard to comprehend the amount of effort requ

GTK3 has the best integration, it now uses native widgets and elements thanks to the work of Caolán McNamara (it is hard to comprehend the amount of effort required). Example: https://www.ubuntubuzz.com/2020/06/libreoffice-looks-gorgeous-on-zorin-os.html https://www.ubuntubuzz.com/2020/06/libreoffice-looks-gorgeou... (this is using the tabbed interface from View - User interface)