No, not at all. Your account is still just a data file on someone's else's federated server. If the server gets turned off before you move your account to another server, it's still gone forever.
Your nostr 'account' is just a private key which is nothing more than a text string;
nsec123456789example987654321abc
It's not a data file. You can literally just write it down on a piece of paper. You can't do that with any other social network.
And that's all you need. Because nostr is a protocol, and not a company there's no one that owns or controls anything on nostr. There's no federated servers to store anyone's user accounts because there are no accounts, just public/private key encryption.
You enter that private key string into any nostr client, and boom, there's your account. Ready to use. And there are dozens of open source nostr counts to choose from.
#nostr #fediverse