> because of the lack of workspace reordering in tmux

What do you mean? Commands like tmux swap-window and tmux move window allow you do move the order of the windows / workspaces.

See this discussion:

http://superuser.com/questions/343572/how-do-i-reorder-tmux-...

It kind of works in the end, but it's arguably a bit more awkward to use than in screen.

Your right, I remember that discussion: I actually use pier solution, with the shellscript (I assigned them to Ctrl-A + Number)

I agree that it does not work 'out of the box', but once setup, it works quite nice :)

I'm a screen die-hard. tmux is probably lovely but since it's not on 100% of the machines I use, it's not going to get any traction with me.

You're not! I work on a team of Screen enthusiasts. We all use it, every day.

Why not just keep your key bindings compatible with screen? You can't stay with legacy systems forever.

There really isn't anything 'legacy' with screen. I've been using it for 20 years daily. I really have no reason to switch to tmux because I really can't see anything screen doesn't already offer me.

Vertical splits were patched in and added a long time ago, screen is usually installed by default, so I know it is there on systems where I'm not allowed to install packages. I can share screen sessions with co-workers, split windows etc.

> Vertical splits were patched in and added a long time ago

IIRC, that patch floated around for a while.

The other thing that tmux brings to the table is better scripting support than screen + things like tmuxinator (for me at least).