Can someone please eli5 how this relates to Solid [0]? Is it an alternative? Completely unrelated? Would they work together -- and if, how?
With data portability you can export data from one app and import it into another but there's no ongoing sync.
in simple english: It is the dream project of whoever come up with cookies. basically cookies as first party data that you can download, upload, shared. All while having either the trouble of hosting a lot of infrastructure (just like the creators of email protocol thought everyone would do, ha!) or relaying all that info to a 3rd party like google or facebook. The nightmare scenario to everyone saying 3rd party cookies are bad.