Comment # 57 on bug 1182666 from B

(In reply to Stefan Dirsch from comment #56)
> No, that's just a package update. First the files of the new package are
> installed, then the files of the old package which are not part
> of the new package are uninstalled. At last the %triggerpostun of
> nvidia-gfxG05-kmp-default is running. At that point there is
> kernel/ subdir. Check this out.
> 
> https://docs.fedoraproject.org/en-US/packaging-guidelines/Scriptlets/
> #ordering

Yes, I read the link but I'm saying is that I observed it differently.
When you run zypper dup the summary for package updates usually says "The
following X packages are going to be upgraded: ..." but with the kernel-default
5.11.4-1.2 -> 5.11.4.-1.3 it was:
"The following packages will be removed: kernel-default-5.11.4-1.2" 
"The following packages will be installed: kernel-default-5.11.4-1.3"

So in this specific situation that ordering doesn't apply, a package gets
removed, a new one installed and that's how those Nvidia modules in
/lib/modules/$kernel/updates/ get deleted.