For those not following NXT, I have been divorced from NXT.
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A passport system for assets that allows the asset holder to decide the blockchain they want to reside in. While the PoS mechanism is fully protecting the NXT holders as designed, it allows the creation of a hardfork that ignores other parts of the ecosystem, like assets.
James, have you considered starting a 'relationship' with Qora after your divorce from NXT?
I think you would find the Qora dev team very easy to work with on something like your asset passports protocol.
Any current or future blockchain is invited to join.