The latest daily build live ISO images that landed earlier today for Kubuntu 18.04 LTS (Bionic Beaver) apparently uses the Breeze-Dark Plasma theme for the KDE Plasma 5.11 desktop environment by default. However, we’ve been told that it’s currently an experiment to get the pulse of the community. If you want to test the Breeze-Dark Plasma theme for Kubuntu 18.04 LTS (Bionic Beaver), you can download the 64-bit or 32-bit live ISO images right now from the official mirrors, write the ISO on a USB stick and boot it on your computer. Don’t forget to let Kubuntu devs know if you like the change or not so they can take a final decision on the switch.