I'm looking forward to seeing Org Mode implemented as a language server. It's unfortunate that such a great general text organization tool is locked into the relatively small Emacs user community.
orgmode is so not a markup language and cant be served via lsp. its a whole ecosystem built on top of emacs. short of rewriting it, implementing it fully in another editor would require a sort of virtual emacs machine running in the background
Typescript or Rust are also not markup languages, and language servers for them allow for many interesting, non-trivial operations, so the model is capable.
Ergonomic keybindings would be a challenge though.
