There are times when I do good amounts of work via the console even when I have plenty of screen real estate. But GNU screen or tmux are much better ways to go about it than C-z etc. I wonder if this was written by someone who hasn't heard of screen? Screen does work just fine on a Mac too, I use it all the time. I haven't gotten around to trying tmux anywhere yet.

I would have just left this comment on the linked article, but it doesn't seem to allow comments.