I dunno if it's actually vim or some variation on it, but it is the default on, for example, Arch Linux, although I believe most other distros dropped me into i

I dunno if it's actually vim or some variation on it, but it is the default on, for example, Arch Linux, although I believe most other distros dropped me into it as well (e.g. git commit / rebase -i). If there is such a thing as user hostile in the world of CLI tools, then dropping the user unannounced into vi with some open buffer most definitely counts as user hostile.