This style of command interaction via buffer was kind of how a lot of early systems worked and it's kind of sad how this method disappeared and was replaced wit

This style of command interaction via buffer was kind of how a lot of early systems worked and it's kind of sad how this method disappeared and was replaced with the Unix shell (and I assume VMS) command/response flow. Consider the C64 BASIC environment. In that case not a "buffer", like emacs, but just really the text screen memory, but same effect. To repeat a command, move the screen arrows up and hit return. Execute any content off the screen. It's nifty.