Theres so much client side only stuff needed/wanted.

- private user labels/tags/notes

- private hierarchy of bookmarks

- private relays (dont broadcast my local network or onion relays)

- private liking (can be done as labels)

- private metrics capture (who i liked most, who i zapped most)

- export/import private data

- extract images/videos/audios from label to a webdav server