The one thing that I like about Nostr (the protocol) is that you don’t need to create an account for every platform.
Instead, you create a pair of keys (public/private) that can be used across all #Nostr platforms/apps and everything (content to social graph) is just there, wherever you are.
And you can change your handle (to a domain) as often as you want without losing anything, because you’re not locked into platform-specific accounts.
I wish ActivityPub had this.