No, I still don't get it. It's just delaying the inevitable. As soon as you have any one program on your system that uses any of the new library functions, you have to upgrade SharedCLibrary.
Also, I don't see why people seem to be scared of this. It's not like it's very difficult or suddenly breaks anything.
Andrew; I've not come across any problems caused by the new C library myself, but if there are any issues, surely it would be better to identify them and get them resolved rather than fudging round them.