This says that “virtually every Warner Bros DVD disc manufactured between 2006 and 2008 has succumbed to the dreaded laser rot.”

I’ve upgraded most stuff to blu, but I dug out my old LOIS & CLARK season 1 set and this was accurate for at least one disc.

https://www.joblo.com/hundreds-maybe-thousands-of-your-warner-bros-dvds-dont-work-anymore/