Um, dude, back in the day, all you got were CAPS. (And that was still true ten years later, in 1979, with my Apple II Plus.)
Are you sure? AFAIK the earliest LISP (1958) supported lowercase, PDP-1 (1960) had lowercase, the ancient SAIL keyboards (1960s) even had Greek letters on them.
Anything that was done using punchcards was all uppercase.
Btw, did you know that the 'SAIL' assembler/debugger was called 'FAIL' ?