@fabionatali You can get an account on a TOPS20 (and other) systems @ https://sdf.org/
A while back, I fired up TECO emacs for the first time in 3 or 4 decades. Oh my. I could edit with all the "standard" emacs control sequences, but today's GNU emacs is a different animal.
@eludom This is cool, I didn't know, thanks for the link!