rtcvb32: Though floppy disks in the past died much faster than our media does today...
For the sake of historical clarity: the data on them got corrupted quite easily, but they rarely died. Usually a full format (or a repeated full format) got a corrupted disk back to a usable state, with full capacity and no bad sectors. Using floppies for long term storage was a mad man's game though.
idbeholdME: Agreed, but there is one difference. Getting a physical from retail nets you a pressed disc. The burnt ones, which you can make at home are much worse when it comes to longevity.
It's true writable disks have a limited shelf life, as the organic layer responsible for preserving the "burned" data degrades over time. But it had gotten to a point where 50 years were a given with adequate storage conditions... and if memory serves stuff like "Azo Blue" was said to last over 100 years (lifetime guarantee™ and all that).
I still remember caring and worrying about these things back in the day, but I've grown wiser since then... any type of storage media will usually die out due to technical obsolescence long before it degrades itself into oblivion.