The "Bible" of investing is "Security Analysis" by Graham & Dodd, but it has MANY versions.
Some prefer the original 1930s version.
Some prefer the newest version updated for modern stocks and companies and times.
But it's nice to be able to see the iterations, with their respective time-stamps in one place, to make that decision.
Same goes for articles. For my articles, I want to do revisions, but don't want to lose control of the original. It allows both myself AND the reader to see where