This might be a good case for unicode character literals. Code dealing with unicode can be a nightmare to work with, even if you already know what those numbers are (arguably as this bug demonstrates).
Oh yes, Vim's code is anything but pleasant. I worked with it a decent amount several years ago when I was maintaining, for a short period of time, a patch that would add a terminal emulator to Vim windows.
It's nice to see terminal output at the same time as you're editing. Right now I'm working on a Rails app, so it'd be great to see RSpec failures while fixing my code--currently I either alt-tab between terminals or use a second monitor.
Also, sometimes you don't want to wait for something. `bundle install` can take a good 30 seconds...I'd rather not watch that!