Someone just showed me cider-inspect. It's awesome, it's like sayid but a bit simpler. Gotta get some vim integration on this 😉

I haven't seen how that looks in Emacs but I fear it is still quite hard to build proper UI for such features in Vim.

Luckily next Neovim should will externalize more of the UI components so I guess eventually it should be possible to customize the UI more.

Voom/UndoTree/Gundo/etc. exist, so I remain optimistic this is all possible 🙂