aral, 
Fedora Silverblue 40 is out today. If you have rpm-fusion layered so you can’t upgrade through GNOME Software, run these commands in Terminal:
- Pin current version:
sudo ostree admin pin 0
- Handle rpm-fusion nastiness:
rpm-ostree update --uninstall rpmfusion-free-release --uninstall rpmfusion-nonfree-release --install rpmfusion-free-release --install rpmfusion-nonfree-release
- Rebase to Fedora Silverblue 40:
rpm-ostree rebase fedora:fedora/40/x86_64/silverblue
