TIL: Easily cycle through all open tmux sessions

from blog Guru Das Srinagesh, | ↗ original
My tmux workflow thus far has been strictly windows- and panes-based, meaning I usually launch only one tmux session and then create named windows and panes (horizontal and vertical splits) as necessary to deal with the set of projects for the day. While this works well, things get quickly out of hand when there is some firefighting to be done...