I've burnt to 10+ year old disks and they still work fine, mine are probably medium quailty disks but they are white printable ones and on a spindle so no idea what brand they are. DVD's do degrade over time but I think Taiyo Yuden were supposed to be really good quality ones weren't they?
Data Hoarder
We are digital librarians. Among us are represented the various reasons to keep data -- legal requirements, competitive requirements, uncertainty of permanence of cloud services, distaste for transmitting your data externally (e.g. government or corporate espionage), cultural and familial archivists, internet collapse preppers, and people who do it themselves so they're sure it's done right. Everyone has their reasons for curating the data they have decided to keep (either forever or For A Damn Long Time (tm) ). Along the way we have sought out like-minded individuals to exchange strategies, war stories, and cautionary tales of failures.
I bought last time DVDs in August of 2007 and CDs way earlier. They still work whenever I need one (and I'll probably never get to use them all). Write, verify, move along.
I still have around 20-25 Taiyo Yuden DVD-Rs left from around 12-13 years ago that I still occasionally burn with no issues.
I so miss the days of buying them and BD-R discs from supermediastore.com, which is unfortunately no more.