Probably the only way to figure it out...I for one would rather just have the external bc using disks on the go seems like something very few people would do. I saw something about people not knowing how to rip a DVD, well if you buy a $2,000 computer you should probably know how to do it or could easily figure it out, or you didn't need that expensive of a computer in the first place.
Apple will probably not toss it all together if they do go that route, because I'm sure some people have no control over disk usage (what they are required to do for work) and therefore having one would still be valuable. But with the Mac App Store, digital media, and cheap USB storage, the need is quickly dying. Also, storage space isn't a huge issue anymore with portable external drives, USB drives, etc. So the only way I could see the drive being useful is for Blu-Ray discs, because the quality of video is not often found online and the amount of space it can hold is enormous, but Apple doesn't do Blu-Ray.
While I understand the points people are making in both directions, SJ's mind was made up a long time ago. They try to make products that the consumer will want, before they know what they want. The floppy drive died, the OD is next. The enormous amount of space required to haul around in a portable machine could be used for something greater that will be used on an everyday basis. This is why for most people it's not an extremely important thing to have and at least having the option of it being removed is nice. The amount of files that can be stored on a much more portable thumb drive and can be edited and rewritten on the same drive essentially makes CDs obsolete. Also, a portable external hard drive that can hold at least a terabyte isn't really bigger than a CD case. If you need to edit data and give it to a lot of people do you carry around a stack of discs to burn? I think not, and if you do you are clearly being inefficient.
I think that once ODs are removed on a larger scale than just the MBA, people will start to realize that they truly don't need them on hand at all times and having a larger battery or better cooling or more storage space for files or a lighter machine would be more useful overall.