We are approaching the time where the lifespan of CDs (DVDs, BlueRay etc.) from the late 90s and early 2000s reach their limit.
In general, factory-pressed CDs and DVDs are expected to last many years if you store them under ideal conditions, but the exact lifespan can vary. Some studies have suggested that factory-pressed CDs and DVDs may last for up to 20 years or more under ideal conditions, while others have found that they may begin to degrade after just a few years.