Tmux is slightly nicer than GNU Screen is some respects but I still use GNU Screen.
For one, Screen is everywhere. I can go from system to system and it'll be there.
Also, I use a Mac and Tmux doesn't work with the Mac's clipboard; probably the biggest reason I can't use Tmux.
Screen has had vertical splitting for sometime now, just get a beta release or build from source (https://savannah.gnu.org/git/?group=screen). That's what I use and find very stable.
For one, Screen is everywhere. I can go from system to system and it'll be there.
Also, I use a Mac and Tmux doesn't work with the Mac's clipboard; probably the biggest reason I can't use Tmux.
Screen has had vertical splitting for sometime now, just get a beta release or build from source (https://savannah.gnu.org/git/?group=screen). That's what I use and find very stable.