Tmux is the one tool I use every day at every company I've been with. At my current employer we have a lot of new grads and I strongly encourage them all to use tmux. We have a about a third of our devs on tmux now and they all love it. I have converted many devs, young and old, to use tmux. Once you get the hang of things you are hooked and you can learn 80% of tmux in 10 minutes.