Ok fair point. The SSD is arguably a performance part and a power saving part and was first introduced to Macs in the Air in late 2010. So there is some precedent for the air getting a fun new feature first. And you never know.
Apple didn’t design and make their own SSD. It was a Toshiba part. Given it’s Apple’s first in-house modem, it’s unlikely it would be used in a high performance device. I’ll concede it’s possible but wouldn’t make much sense given how conservative Apple is.