I find his comment on using Plain Text interesting. I've got a project that would benefit greatly from storing it's files in a db as opposed to the file system. But I continue to resist the urge because damnit! Sometimes all you have is vi. I've toyed with the idea of a simple way of importing and exporting the data to and from a db, but again, who knows how things can break. I made the same choice with decision to the protocols, tokenized human readable text. So it's nice to see someone think that that decision was still worth it 30 years later.
Now I just need to get that O'Reilly book written. :)