I'm not sure why the author advocates job control (ie ctrl-z/fg/bg) instead of using tmux/screen. A multiplexer offers far more flexibility, and most importantly does not lose state even if your session ends (eg ssh connection drops).
I didn't mean for them to come across as mutually exclusive. The ^Z/fg approach is great for keeping context: Go to a directory, run something, edit something, suspend editing to run something else, resume editing, finish back at the command prompt.
With tmux I'd need to create a new pane, navigate to the same directory, and reinitialize any environment stuff like virtualenv.
