Users can have multiple email addresses, from different providers, and not correlate/link them. Each email address can be used as a different persona, and nobody but the user will know that they actually belong to the same person.

Not sure why you replied to my post, since I wasn't addressing correlation at all.

Moving to an email based identity system will let users have multiple choices in how they identify themselves online.

I'm not seeing it.

I could offer you multiple choices of title in my service, but that wouldn't really give you a choice about *whether* to serve me; the choices we provide to users will not only give them enough freedom to satisfy *some*, but shape their ideas of what freedom *is* - to the extent they accept the limitations we thereby impose on them, the way their practices *conform* to those limits will seem to reinforce and confirm the righteousness of whatever theory originally suggested they only *needed* such freedoms.

I think the market has shown that an URL-based identity system without any additional attributes (basic profile info, email address) or services (the ability to send notifications to the user) is not really a viable product, since the RP might as well have the user register a local account.

The ability to send notifications to the user is "push"; a browser opens when I need it and goes where I send it, which is "pull". I am aware of efforts to add "push" functionality to the browser, to some extent, but it is mostly the automatic (or outsourced, p2p) gathering of data whitelisted as (or vaguely related to) my interests; there is no "spam", whereby an arbitrary third party can bombard me with any amount of unwanted (to me) communication that they desire. I do not see how the failure of one identifier, based in the "pull" realm, implies the success of one entirely based in the "push" realm.

Or has E-mail, too, evolved toward center?

-Shade
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