@burdges and @alinush can you confirm the context and scope of what you have in mind here?
Specifically, my suggestion was in the context of creating keyless accounts between Relay Chains (L1’s outside of Substrate).
I did not suggest, and do not support, using this to onboard new users from outside the current ecosystems. @alinush I’ll DM you for the reasons for this. But you can see a use case outlined here:
You can think of this functionality as creating escape hatches for users in case either chain fails. Of course users still need a life raft once they have setup an escape hatch. But, baby steps.
This use case also has numerous subtleties to try to work out. But first there needs to be agreement that this is the target use case.