Neat and I like the presentation with asciinema, but couldn't you just use zsh's built in "cmd + r" command to search in history for commands you used in the past? I usually use that + a good old alias for things I use a lot.
Advantage: It's available everywhere and you don't need to remember new commands if you SSH into another server where butler isn't installed.
Yeah it's not quite got enough to beat an alias or ctrl+r - Butler is another cool little tool I'm going to keep forgetting to use.