I think one of the points that this and some of the other comments may be missing is that this isn't electron with vim keybindings, it's an electron gui for a r

I think one of the points that this and some of the other comments may be missing is that this isn't electron with vim keybindings, it's an electron gui for a real (neo)vim process running in the background. All your standard vim features are there. A user only familiar with Oni shouldn't have much trouble using a standard vim install. There's definitely an argument to be made that Oni may not add much over running vim in a terminal, especially given the increased resource requirements inherent to electron, and I'd certainly like to see a high performance cross platform neovim gui that doesn't use electron, but I think Oni at least delivers a very useful experience on its own by building on top of all the work already invested into vim.