You're not gettin' the point. There's nothing here if you think about it for 10 seconds. Any ancient anything, could run vi, or vim, or Emacs, or friggin' wordstar, natively or via emulation or WHATEVER. There's nothing here.
Nope. We already had a frigging phrase for that, and it’s “completely valid”, not “valid AF” or “cromulent” or whatever. Dumb.