Actually, that's true. You can do a multi-session recording, but my point was that it's not at all like a normal file system, where you can format and then copy files. You still have to prepare the track for each session.
And to my knowledge, with CDRW's, you need to still blank the whole disk when reusing it. You can't just erase specific existing tracks to replace them.
It's mostly a matter of simantics. The term "copy" just isn't quite correct, and offers a false sense of the actual process involved, and with many people, will cause confusion down the line.
As far as the compatibilities across different OS's, you have to think about your target. You can create a CD that supports several filesystem headers, with cross-compatible file naming conventions... but you have to explicitly make that choice.
I definitely agree tho. Apple needs to get with the times, and support what's more commonly accepted as the standards. If everyone else is able to support several formats, is it really that hard for them to do? Hopefully, OS X (being a UNIX base) will take them a few more steps in that direction.
Cheers,
-Alex