Instead of tmux, I personnally use Wez's Terminal (Wezterm: https://wezfurlong.org/wezterm/) because it is both a capable terminal and a capable multiplexer and I like to have one less layer to care about.
I use wezterm and love it, too - BUT, it doesn't yet support SSH agent forwarding, which are an integral part of my workflow for some machines.
So it's great -- for me -- for local connections, or remote ones where I don't need to pass an SSH agent, but it's not yet there "fully" for me the way KiTTY is.
One thing I personally like very much is that it supports a command line tab and pane navigation/management : https://github.com/cassepipe/dot-git/blob/8b300524021cc74f67...