Eh, not really a problem. Your CD-R issue is pretty much the same as you not having a cylinder phonograph player - a device that is already 100 years old. Sure,

Eh, not really a problem. Your CD-R issue is pretty much the same as you not having a cylinder phonograph player - a device that is already 100 years old. Sure, if you do not have such a player you cannot play the cylinder, but the audio stored in those players isn't lost, players exist for those who want to listen to the cylinders and given enough money, new ones can be made. Similarly, you may not have a CD-R or DVD-R reader, but it takes about 5 euros to buy one and access your CD. In 100 years it might cost more, but i'm willing to bet that CD-R and DVD-R readers will still be available in much greater numbers than cylinder phonograph players are. Making new ones, for really important data, will certainly be more expensive than making a new cylinder player but it wont be impossible - if the data is important enough and for some reason all the millions of CD-R players in existence nowadays has vanished, a new one will be made. And analog formats aren't that great either - most of them tend to wear over time, so they have their own drawbacks.