Fedora 40 Beta is currently on target to be released March 12[0] and will include KDE Plasma 6 so if anyone is looking to avoid running Rawhide it's only a two week wait for a beta release. It's also possible to install from the most recent build of the pre-beta 40 branch[1]
[0] https://fedorapeople.org/groups/schedule/f-40/f-40-key-tasks...
[1] https://kojipkgs.fedoraproject.org/compose/branched/latest-F...