Oh I dunno . . . certain smells just take you back to wonderful places and times . . . the smell of rain, a baby's head, school on the first day back after summer break, the beach, a new car, Mom's meatloaf . . . However, record-a-scent would be better than factory-produced ones for sure. And to dispute David's assertion that scent isn't all that important - have ya ever heard of
pheromones? And why is there a fragrance industry if smell isn't important. (I know you were talking about it not being important
enough to add to communication devices.) But, just for grins I looked it up, and there is a whole
website devoted to the sense of smell.
So again, I dunno, and I'm sure there would be an extra charge which I probably wouldn't use, but it is interesting to think about . . .