Mount Rainier offers drag and drop CD rewriting and on-the-fly formatting of the disc, making the CD the ideal floppy disk replacement.
DVD is not good. It isn't secure, the capacity is too low, the bit rate is too low.
If we want a unified standard, it has to be better than the sum of the parts. We would like to find something that's better in the other standard than ours, but we haven't found it.