If I were worried about longevity, I would not personally rely on a bunch of DVDs I burned.
So load the files onto hard drives as a backup. That's what I do.
It doesn't seem like you're looking for a solution, just a method to hear yourself complain.
I was responding to your implied advice to burn media onto DVDs for long term storage. I never asked for any solution.
It seems like your intent here was just to be condescending and rude.