I don't use my cds too often anymore, but I've got a pressed 2-disc set of the soundtrack from the song remains the same that's became unplayable because the media developed holes.
These were stored in the case in my home, mostly coastal California, no severe environmental conditions.
Disc rot of pressed CDs seems rare, I don't think I've seen it on other discs, but if it happened to me, it's definitely a thing.
I'm sure defective ones exist. For kicks I just opened my first CD, Bryan Adams' Reckless, bought late '84... it's in perfect condition. Put it on, and it sounds great just like the first time.
These were stored in the case in my home, mostly coastal California, no severe environmental conditions.
Disc rot of pressed CDs seems rare, I don't think I've seen it on other discs, but if it happened to me, it's definitely a thing.