I think something like BTRFS might be a better solution as overlayfs seems to freeze the system image state. Something which is copy on write (COW) seems like it would be more resilient and still provide an RW file system. To do it right would probably be a combination of the two with the data partition BTRFS and the system image partition overlayfs.

This has happened several times to my Pi-Hole. Even with backups, trying to get my network back online still takes too long. I haven’t found a good solution for resilience yet.

You could argue that place was a copy. Before that you had The Million Dollar Homepage (https://en.wikipedia.org/wiki/The_Million_Dollar_Homepage?wprov=sfla1) in 2005, where companies could buy a pixel for a dollar. I have a hard time believing that it didn’t have some influence over the creation of place.