nostr:npub1earna05hx6ax38r33h3atmecjzdu547m8suw87w70aw6mlyga4hsqcja5j won't be the only Nostr client to custody keys for users. Even if ZBD plans on allowing users to export their keys at a later date, at some point we will most likely see another Nostr client that won't allow this. They may even clearly state this in their business model. The beauty of Nostr is that it's truly open. That means any client can be built in any shape or fashion that fits their user's needs. The free market will prevail here though, I think. Users will want to try other experiences and advocate for their clients to allow them to do this. And if they don't, those clients may not make it. Freedom and user choice will prevail.