I'm pleasantly surprised that people 1. care about this corner of computer history, and 2. have so much knowledge. I know there's a lot less to look through, but things like having found a message on the disk for the released version of PC DOS, even though it apparently was just un-scrubbed data outside the filesystem, seems crazy. I suppose the closed nature of the releases has been offset by the relatively open platform and the fact that they've had decades to dig through it.