As an emacs user, I struggle to see the purpose of tmux when emacs gives me a lot of control of my screen layout.

I can see its purpose for vim users... maybe tmux can still have some features for neovim users. For emacs.. my answer is simply all-in emacs. When I saw a screenshot of emacs in the article, I thought I was in for some education... but sadly not the case.

Maybe I am missing the point - but I am happy to learn.