k3b won't write

Yes, that has been the case for some time…
https://bugzilla.redhat.com/show_bug.cgi?id=1580021

In particular, the story about wodim and the security issues it presents are nicely summarised here…

wodim only exists because a hostile and uninformed Debian packetizer believed that writing optical media does not need special privilleges while starting personal attacks against me in May 2004.

His claim never has been true for any platform and this never has been true for Linux.

Since the main method used to “make the claim to apparently work” was to remove security checking code, I cannot tell whether wodim is a security risk when installed sid root.

The original software always was and is autited for security in this mode and not a risk.

In addition, cdrecord supports to work with fine grained privielleges on Solaris since January 2006 and after Linux added similar support in 2013, the fine grained privilege support was enhanced to Linux.

I recommend to use recent original software instead of the long dead code that was only seen as a hostile social attack froM Debian.

Check the most recent orignal code as part of the schilytools at:

http://sourceforge.net/projects/schilytools/files/

Is wodim the missing piece? Any clue why it isn’t in any of the normal openSUSE repositories?

No, it shouldn’t be needed at all IMHO.