I was perfectly happy using Emacs over a 2400 baud modem, on a fully-functional terminal (VT420 or Telix in DOS). But of course, Emacs' terminal display code is

I was perfectly happy using Emacs over a 2400 baud modem, on a fully-functional terminal (VT420 or Telix in DOS). But of course, Emacs' terminal display code is/was so heavily optimized as to be incomprehensible.