Nothing like -R, but attaching tmux lets you swap the client between different sessions with `<your prefix> L` for last, `s` for an interactive list or `(`, `)`

Nothing like -R, but attaching tmux lets you swap the client between different sessions with `<your prefix> L` for last, `s` for an interactive list or `(`, `)` for next/previous, and some others I forget. If you want to list sessions before attaching then there's `tmux ls` :)