> I realise it's actually a lot closer to Smalltalk than to Lisp -- you have a built in editor, you build memory images that you constantly work with, all the code is decompilable so you can refactor easily, etc, etc

Lisps often provide built in editors; Common Lisp even has the standard function ED for invoking one[0], but like most of the "environment" functions its behaviour is left almost entirely unspecified. Lisp is also usually developed in an image-based fashion. Images are one of the features that separate Lisp and Smalltalk from almost everything else, not one that separates them from each other. Some Lisps provide access to source code from function objects, with varying degrees of integration, and again, Common Lisp provides the standard function FUNCTION-LAMBDA-EXPRESSION for this purpose[1]. They don't generally work via decompilation, but neither does Smalltalk.

0: http://www.lispworks.com/documentation/HyperSpec/Body/f_ed.h...

1: http://www.lispworks.com/documentation/HyperSpec/Body/f_fn_l...