Switching to thumb drives will allow you as my client to be able to bring back the thumb drive (for a discount off of session) to reload your new images. :) I will still keep all of my edits, but this will get rid of your home filling with disks that can be scratched or broken. Also, these can be used on the ipad where the ipad will not take a disk, and some older computers and laptops will not read DVDs.
Here is a preview of what my thumb drives look like, yes it is an iphone pic. :/