I think 'hostile' is a bit harsh. I'd say 'infinitely reticent to large changes'. All the neovim authors wanted, was a list of blockers needed to merge their async patch. Bram would never give them that, always coming up with one more change. I've seen this pattern of infinite reluctance before, especially when communities depend heavily on one maintainer. its not about async and the specific semantics of the patch after a certain amount of time, it's about deeper issues like project vision, control, and perhaps trust. https://groups.google.com/forum/m/#!topic/vim_dev/-4pqDJfHCs... https://geoff.greer.fm/2015/01/15/why-neovim-is-better-than-...,