Sometimes, I think that there is a misunderstanding of the way technology works.
Just because something new has been invented, and wins widespread acceptance, does not mean that the older technology is discarded or immediately rendered obsolete.
The invention of TV did not lead to people abandoning radios.
Likewise, for watching DVDs, and playing CDs, those of us with Apple computers will still probably continue to use the Superdrive for quite some time, as the technology is useful.
As I write this, in fact, the Superdrive is sitting beside me on my desk, and just beyond that, is a DVD (which my brother gave me) of Grand Hotel Budapest, a movie I have yet to watch but shall do so sometime soon…...