Did you/others also have that disc with bitcoins (wallet.dat backup) or is this more of a meme than the truth?
No idea about others, I personally never stored (important) backups on CDs.
Even today I still got a whole bunch of wallet.dat-backups that go back to 2010, stored on different thumbdrives and SD-cards.
Just checked them and guess what? Everything is still where it's supposed to be, I can still read it all, nothing is corrupted.
"sad stories":
Yeah, sad, but... if people are not careful with their backups, especially if it's "money", they might lose it.
That's even true for seed words, if you lose them, your wallet is gone.
So be careful and think about what you're doing.