> There's no separation - like in traditional GUIs - between what's accessible to user and programmer I'm currently poking around Smalltalk, which has both GUI

> There's no separation - like in traditional GUIs - between what's accessible to user and programmer I'm currently poking around Smalltalk, which has both GUI and ability to fully customize everything. >I wish GUIs would learn from that, but I don't think there's any GUI framework attempting this The very first real GUI (in Xerox Alto) did all that and it was developed several years before Emacs.