i have no experience with lisp machines, but i'm fairly confident that it is not true that s-expressions are processes.did lisp machines even do multiprogramming?
I used them. They were nice. For those who didn´t tried them, quite a bit like emacs. Not too modular, that is what I meant. In Plan 9 processes and file interfaces lead to highly modular systems without much effort. I´m now addict to that, and wouldn´t like to loose it.
