Although I use my super drive a lot to burn large media files (e.g. HD and 3D HD video), unless you have a very specific reason like that to use the drive, most people really like not having it as it reduces weight, size, noise etc.
If you find you do need one at some point, as previously mentioned you can always get an external, and I'd even recommend getting an external Blu-ray drive/burner that will also play DVDs and CDs but have the ability to store huge amounts of data and, with enough workaround, read Blu-rays if you're ever so inclined.