Smooth scrollback in a terminal emulator using the mouse/touchpad, with terminal tabs, is way too useful for me to switch to tmux for general use. I use scrollback a lot. Sometimes I search scrollback too, which some terminal emulators do nicely.

If they would just add a tty protocol for good scrollback! :-)

I do use GNU Screen on servers for long-lived sessions. Just because it's more familiar than tmux to me. It's great for persistence, but really annoying to have to use key combos to look through and search the scrollback in Screen sessions, so I tend to log all sessions to files and read the real-time logs with `less -R` and `ripgrep` when I need to look back through session history, even though I could use the Screen interface to do it.