Discovered in passing that Linux Fedora 43 had been release two days ago… so.. another upgrade to run.
It went flawlessly, smoothly and fast! Less than 45 minutes!

linux fedora upgrade from 42 to 43
as root user
dnf upgrade –refresh
dnf install dnf-plugin-system-upgrade
dnf –refresh upgrade
dnf system-upgrade download –releasever=43
rem if needed: dnf system-upgrade download –releasever=43 –allowerasing
Transaction Summary:
Installing: 59 packages
Upgrading: 3302 packages
Replacing: 3350 packages
Removing: 4 packages
Downgrading: 34 packages
Total size of inbound packages is 4 GiB. Need to download 4 GiB.
After this operation, 780 MiB extra will be used (install 11 GiB, remove 10 GiB).
dnf system-upgrade reboot
done at 8:45
Linux version 6.17.5-300.fc43.x86_64
dnf system-upgrade clean
dnf clean packages
dnf upgrade
done at 8:45