The article has very limited technical details to avoid confusing people who don't know what they are doing, but the reality is that if they are reading my blog, or are reading HN then they have the technical details to understand something much more complex than what I wrote.
I clearly state at the bottom of the article that the software still keeps your passwords secure and that I will continue to use 1Password. AgileBits still have my full support, I just want them to inform the users the downsides of using agile keychain, and to use OPVault by default.