@ olsen
Wonderful analysis, thank you!
@ thread
Dave Haynie's notes about Disk Doctor (from the Disk Salv documentation) also merit repeating here. The story he recounts is that the developers were unsure of whether to keep Disk Doctor, so they put its sourcecode on a disk and ran Disk Doctor on it. Needless to say, it did not survive.
We may never know if that's 100% true, but it's a great story.