The life span of CD/DVD is not on the printed media but on the media we make/made our backups on. Of my many spindles from back in 2k (some disks are almost 25 yrs old), so far maybe 5 disks have gone partially or completely unreadable, lucky I didn’t lose much. Baring scratches or other physical damage, the printed disks will last decades where my disks have outlasted prediction