Seeing how people add all sorts of URLs to their Damus relay lists I wonder if the best Nostr app UX isn't just a single big list of stuff.

Do you want to write to a relay? Add it to your list.
You want to read from a relay? Add it to your list.
Do you want to browse a niche relay every now and them? Add it to your list.
Want to upload stuff to a Blossom server? Add it to your list.
Wanna bookmark a note? Add it to your list.
Wanna join a NIP-29 group? Add it to your list.
You're interested a hashtag? Add it to your list.
Follow someone? Add to your list.
Do you want to run custom spell or scroll? Add it to your list.

Then the app understands everything you want from that and displays all the UI views you need.