Does anyone see one of the problems with this approach? What if a user visits a site multiple times, and searches the website, looking for new/different inform

Does anyone see one of the problems with this approach? What if a user visits a site multiple times, and searches the website, looking for new/different information that they have not found previously - would they have a different experience? Would this lead to people being lost in multiple forms of the same site? Even if you tried to track a user, unless you force people to sign in w/ an account, most likely it will be impossible to tell if the same user has returned. What about link sharing? This site, yc, is all about sharing links and information. Would this break existing link sharing sites? Wouldn't there at least be a cognitive difference between people in discussions of a site using this software? And still yet, would an approach such as this give users the feeling of personallization and a better user experience or disenfranchisement of a constantly changing layout/experience? Although something like this combined w/ socialhistory.js would be really nice; that way you could ensure one form over another with greater accuracy and no need for a click history on the site - the information would already be available.