R/W or even write-once CDs and DVDs have been known to have finite shelf lives for decades now. Yes.
One solution is to rewrite them every few years, but that's time consuming, and unless you have a really compelling reason to do so, the investment needed to make this practical, with autoloaders, labelers, and such is prohibitive. At work, the old mainframe reel tape libraries were converted to robotics 30 years ago, then converted to cartridges, and and finally about 12 years ago to a virtualized tape environment - all the requests still refer to carts and such, as if the arms are still running around grabbing plastic, but it's in a SAN and that's properly backed up and virtualized, at least so far as we can tell. Hopefully it's secured better than the storage on the Z series that went tits up this spring. I only lost around 20 VMs, but one had around 100 million customer reports that were lost, and the application software, and the server OS and all other software. About 7000 or so VMs were lost, some irretrievably since the owners didn't have offline copies. If Infoworld still published on paper, this would have worthy of the back page.
The best practice is probably to replicate that and copy optical media to something more durable, replicate it, and keep the originals if you must in a cooler environment, as heat seems to be a factor. Some brands have had worse longevity than others, but that's a crap shoot.
Now ask me about my cassette tape archives, or the 10" reel tapes I would have to buy a machine to use... Sentimental value now, I'm sure they would need go go back to 3M to be recovered.
Data archiving is a pain. I've given in to archiving everything, rather than wring my hands over what 10% of it I really don't need.