orcishgamer: I'm well aware that my CD may go at some point, your DVDs can as well contrary to popular belief. If they do go I still have a perfect digital ISO image file. No I don't have offsite storage, I suppose if I was really paranoid I could get some.
GameRager: According to the wiki page DVDs are much less susceptible than CDs and gold reflective layered discs(master discs) are very good at rot prevention, over standard aluminum layered ones. Just buy some gold layer DVDs and back up everything I guess if you want to keep physical 1:1 copies.
Your glue can still rot. Some discs are far better manufactured, this is true. Some discs will last 25 years and some will last less than 5. It's important to be picky when choosing burnable media for backups that must last over 1 year.