Fedora 42 ships the nearly-final GCC 15 compiler along with Golang 1.24, the LLVM 20 toolchain, PHP 8.4, Ruby 3.4, and a ton of other software upgrades. If GNOME isn't your thing, KDE Plasma 6.3 is available along with the Xfce 4.20, LXQt 2.1 and Cosmic Alpha 6 desktops. The new kernel 6.14.2 play nicely with ppc64le. I have not encountered any major issue.
GNOME 48 is actually quite good now. The only thing does not work for me is the new Loupe Image Viewer which is unable to view any image.