Well, I have some gold Mitsui 74 / 80 min white-topped discs that so far I have not used and loads of Kodak 74 min white topped disks, once again all unused. These will be used for data or scans that I want to archive with best longevity.
For normal use I use DiskRite white topped 80min discs (SKC) and the only time they have failed (3 out of 100) is when I had a buffer under-run on my Plex 241040a (yes, I had burnproof off as I would rather know if there is a problem - silly in hindsight).
Using crc checks against my original files and Nero surface test they always pass 100% - they are cyanine SKC manufacture. I intend to store them in plastic wallets in cool cupboards so hopefully they will last 10’s of years without problem.
I did find a source of 80min white-top Mitsui golds in the states, but they won’t ship out of the usa and are they worth Â£0.55+ each - no! The DiscRite’s cost Â£0.20 each from the UK.
So, get good quality discs and treat them right and hopefully we all will get 20+ years with them - leave them in warm rooms on table tops, in bright summer light with crumbs / hair / finger prints and what do you expect.
Just my humble opinion.