I believe what they’re getting at is an issue if they’re not already authenticated prior to the outage. Then they’d have no access to their media unless they look into the workaround for that beforehand. It has been an issue in the past, especially when Plex’s auth servers go down. I remember plenty of Reddit threads complaining about it.

I’ve had success finding directories of chd’s after searching for something with “archive” “.org” “ps1” “psx” and “chd” as possible search terms.