You can already do so incredibly much by hooking up a few extra LSPs and keybinds (calling external scripts/programs)!

What I’m personally still missing though:

• Code Folding
• More refined subprocess handling, i.e. term-buffer switching or floating term (when excuting gitui via keybind for example)
• Emacs Org-Mode like context aware styling, for i.e. Bold or Italic text hints from LSP
  • Font changes (restricted through terminal)
  • Different Font/Line sizes for i.e. headings (restricted through terminal)
  • Inline images (sixel!)
• Dedicated optional client, a-la Neovide with cursor animations (helps orientation with jumps etc.), and to alleviate the previous terminal restrictions