This thread has been specifically about responsiveness. Latency, not throughput. Also, the bit about no plugins was a little white lie. I really meant "no plugins for IDE-like functionality (language server, etc)". While many IDEs offer basic vim keybindings, I don't know any that would let me import my .vimrc wholesale and work exactly the same. I'd love an IDE that embeds neovim as the text editor.

Anyway, if you don't care about all that, you can get a similar effect by turning off intellisense (or equivalent) in your IDE while you write, then turn it back on at the end to get what you just wrote to compile. I do this sometimes in Android Studio.