I'm impressed how often ancient elisp code just works. For example, here's some Smalltalk narrowing from 1991!
miniblog.
Related Posts
I loved playing Creatures 3, an ancient game (1999) with some basic neural nets. I'm surprised that ML isn't a bigger deal in virtual pets today!
Wonderful post on the ancient PC that jwz worked on (including writing the Emacs byte compiler!)
Woah, even in 2010, a license for OpenGenera (ancient lisp machine software) costs $5,000 to run on a single CPU! https://www.lispmachine.net/symbolics.txt