After a week if nail biting silence, the first release candidate dropped
for Slackware 15. From the changelog announcement:

"...GCC was bumped to version 11.2.0 (because we just can't send this out
2 versions behind), and everything was verified to build properly or fixed
up so that it did. I don't see any benefit to another public mass rebuild,
so we're not going to do one. Anyway, without further ado, here is
Slackware 15.0 release candidate one. Consider most things frozen and the
focus now to be any remaining blocker bugs. We'll more than likely take that
next Plasma bugfix release, but it's soon time to get off this treadmill.
Enjoy! :-)"

As always, details are here: https://www.slacware.com/changelog 
as well as a the ever amusing commentary over on Linusqustions:
https://www.linuxquestions.org/questions/slackware-14/slackware-15-0-rc1-4175699211/