By ‘emulating’ I don't mean providing a pty, I mean providing a terminal emulator in the usual sense of interpreting control sequences to maintain a screen repr

By ‘emulating’ I don't mean providing a pty, I mean providing a terminal emulator in the usual sense of interpreting control sequences to maintain a screen representation. Dtach and abduco (which I only learned about from this thread) does the former only, while tmux and screen do both.