"There's always Linux Mint KDE version."
Linux Mint KDE is a mostly-community-made derivative of Kubuntu (which is a package selection from Ubuntu). Kubuntu will continue as a community distro so Linux Mint KDE should continue as well.
3 publicly visible posts • joined 7 Feb 2012
"The decision means development of Kubuntu will stop"
This is incorrect. My development on work time will stop. After 7 years as a community distro we have many contributors to carry on development.
I stopped working on Kubuntu for 6 months last year and that release happened successfully.