#solid turns the web into a UNIX type operating system. Meaning that you can write little scripts to achieve whatever you want, giving the right actors the right permissions. Login with npub adds a huge amount to this, both for nostr and solid. For solid it adds new users, payments, auth, apps and zaps. For nostr it adds a full web operating system. This is going to take a LONG time for users and devs to figure out, but the decentralized future is here. And best of all, just like UNIX, it's 100% permissionless, anyone can build anything as easily as writing a script, no need to ask anyone's permission.