Have you ever noticed that Vim demonstrations can sometimes feel a lot like watching a magic show? It's very impressive, but if you want to work out how it was done you're going to have to do some reading when you get home. If they're not careful delivered, demonstrations that are meant to teach new users about Vim can end up contributing to the Vim learning curve myth and scaring the would-be user away.

Read this post in full on the thoughtbot blog: https://robots.thoughtbot.com/vimulator