The reason the floppy disk went the way of the dodo is because the CD, DVD and Flash Disk killed it. It took three separate bits of media a decade to fully eradicate the Floppy from existence.
It will happen to the Optical Disk, but not now - why? There is currently no replacement for the optical disk when it comes to physical distribution.
I walk into a shop and pick a case up off the shelf and do you know what it will contain? An Optical Disk. Give someone a copy of something they can keep? Optical Disk. Give someone a copy of something without also giving them you entire hard disk or flash drive? Optical Disk. Permanent backup solution? Optical Disk!
I have backup DVDs going all the way back to 2005. I couldn't fit all that data onto my current 2TB setup along side my applications, more frequently used data and operating system. Given the price of Optical Media, its much cheaper to burn older data to disk for archival rather than letting it rot on a sector of a hard disk, taking up valuable space and prompting you to either permanently delete the older data or buy another hard disk.
Yeah, there are online solutions, I use box.com - but the 25GB limit for £60 a year is a joke when a pack of 20 Single-Layer DVDs for £5 gives me 94GBs AND I don't have to wait an eternity for it to download/upload.
The optical disk isn't going anywhere until people start doing the following:
-Distributing media and software on cards akin to the PlayStation Vita.
-Creating and distributing media playback devices that uses these cards as their primary storage format (whilst outselling DVD and Blu-Ray players) and;
-Making these cards as cheap or cheaper than optical media to make them a suitable alternative for backups and disposable copies.
Tape is still used and developed and Vinyl is still selling. Food for thought.
... at night.
... at night.