Nostr provides for both the identity and client in user hands but so far most people have experienced nostr through a client with their identity being secondary, often provided by the client (Damus for example you don’t have a contact list if you byo keys)
Nostrum (or others) would allow me to:
- have multiple keys, each keypair being it’s own identity
- authorise keys to certain apps
- manage contacts for that identity in a single location
- manage profile for that identity in a single location
So instead of choosing where I want to go (client) and selecting my outfit (identity) when I arrive, I choose my outfit and then decide where to go when dressed appropriately.
I’m not going to use my main keys, or my real name keys to go play poker; I’m going to have a poker identity. Those keys will be authorised for the gambling apps in my Nostrum and that profile can look entirely different to my others, different Lightning wallet, different badges etc. For all you know StackSatsIO doesn’t know how to play poker, we could play together all the time under different nyms and not know each others other keys.
Take this further, when real world services begin integrating nostr im going to need to have things like phone number and drivers license available (ie in an ubereats competitor) - I don’t want this identity and this lightning wallet attached to those parts of my identity though, I’ll run separate identity for that and only use that for those apps where I need to expose it.
Identity will decouple and become more central to nostr as more apps come online. Right now you can manage flipping between the clients with one identity but when there are 100 or 1000 with everything from social to porn to finance to who knows what?
Nostrum in this case becomes like a vault / sso that I use as a launchpad to navigate between apps; I control my vault so I control my identities and I decide which keys access which clients.
I’m not tied to nostrum here either; those are my keys and my identities, I can go to another vault provider and bring those with me so there’s no lock-in - they’re merely the nostr identity client I use to connect to nostr content clients.