Nostr can offer a use case of storing ecash somewhere safe where it's much difficult to lose it. This whould make all the wallet recovery shenanigans obsolete.
Discussion
In my implementation I am encrypting and obfuscating absolutely everything, including the ‘d’ tags. I also might implement zaps differently, when I get there. Right now I am focused on building a component that can drop into any Lightning address provider, so they can take care of the zaps there. Much to do!