I'd simply guess he'd never heard of it -- it was pretty obscure in the early 1970s. It might have been less accessible to beginners, but Forth was the perfect

I'd simply guess he'd never heard of it -- it was pretty obscure in the early 1970s. It might have been less accessible to beginners, but Forth was the perfect language for those early microcomputers. I loved programming in it on my Commodore 64.