There are a number of small Emacs clones (I wrote one for the 6502-based Atari 800 back in the day). They are certainly better than nothing. None of them existe

There are a number of small Emacs clones (I wrote one for the 6502-based Atari 800 back in the day). They are certainly better than nothing. None of them existed until the mid 80s. Ironically, 130K is tiny todya, but more than half the address space of a PDP-10 :-)