Why not?

Actually, those are of the flash memory modules. Note the 'Flash' tag in the first one, and the fact there is a separate 'RAM' tag. At any rate... feel free to point out where the SSD (which is the same physical size as a 2.5" notebook hard drive) would be located in the first one if that is, in fact, the RAM that is marked FLASH. The entire lower half (the big black rectangles) is the battery.

Yes, and SSDs are indeed Flash storage but built as a drive. There is not 768 GB Flash module.

If you look for any teardown of the MacBook Air on the net you will see where the SSD is. Apple uses a proprietary SSD in both the MBA and the Retina and off the shelf SSDs cannot be used in them (not that it would be easy to install them anyway. But it does indeed use both RAM and Flash, with the Flash configured as an SSD in order to get the larger sizes.

Yes, I saw that in the other post. And SSDs ARE Flash storage. They are treated by the controller as a drive. Apple uses a proprietary SSD/Flash storage for the MacBook Air and the MacBook Pro Retina. Once you are out of warranty if you have to fix your drive you will have to do it through Apple. All an SSD amounts to is many Flash modules arrayed as a drive for storage.

I guess by that assumption hard drives are really hard drives just an array of magnetic platters that store information.

When you array something like flash it is considering a single unit. Or is there no such thing as a 4GB ram module as its multiple smaller nMB/nGB on a single module?

I have no idea what your point is.