TLDR: using screen when tmux is not available. This isn’t a tmux vs screen post but rather how to use the tools that you have to get the job done.
It’s hard to imagine a day spent on a shell without the use of a terminal multiplexer. My favourite tool for the job is tmux, which comes handy when I’m working on or from an OpenBSD machine. tmux is installed by default on OpenBSD for quite a few releases now (circa 2009), you can see the commit log here.
It is easy to get used to something good 😉 However, IT being IT, this wouldn’t be so easy. One reason that I see, is that a lot of servers out there running some sort of Unix-like OS (mainly, Linux) do not have tmux installed. Now the interesting side of this is that I often find the GNU screen installed.