I view "you might not need tmux" in the same way as "you might not need browser tabs".
Yes, if you only have one or two terminal sessions or open web pages then you can probably live without using them, but anything beyond that leads you into reimplementing features to cope with your desktop's lack of ability to manage dozens of windows.
It already has the Early Television Museum: https://nerdydaytrips.org/daytrip/na/us/early-television-mus...