The LISP machine now permits LISP programmers to abandon bra and fig-leaf. Bringing computers into the home won't change either one, but may revitalize the corner saloon. So many good ideas are never heard from again once they embark in a voyage on the semantic gulf. Beware of the Turing tar-pit in which everything is possible but nothing of interest is easy. A LISP programmer knows the value of everything, but the cost of nothing.
Software is under a constant tension.
It is easier to change the specification to fit the program than vice versa. Fools ignore complexity. Pragmatists suffer it. Some can avoid it. Geniuses remove it.