The Trinity Desktop Environment, a fork of the KDE 3.x codebase, has released its latest version.
This release comes with a new D-Bus based polkit authentication agent, new markdown document viewer, support for HTML5 in Quanta, support for Let’s Encrypt certificates, some improvements to GUI options, better cooperation between tdm and plymouth, fix for ICEAuthority ownership stealing when using sudo, various other bug fixes and improvements. It also adds support for Ubuntu Jammy while it drops support for Debian Jessie and Ubuntu Trusty. C++11 is now allowed in the code base.
I doubt the audience for a KDE 3.x desktop is massive, but thanks to the wonders of open source – the people that want it, can have it.