In the mid-80s there were two kinds of lisp machines.
Xerox's machines came with a parse tree editor similar in concept to this one. You were always working with the specific parse tree. A terribly powerful concept.
The Symbolics machines came with emacs and traditional edit a file, load/compile a file kind of editing.
I believe the Symbolics machines were much more successful in the market, however, both kinds of machines are pretty much dead, but fwiw, the emacs style still survives.
That said, on an iPad I think this system might be quite nice.
Xerox's machines came with a parse tree editor similar in concept to this one. You were always working with the specific parse tree. A terribly powerful concept.
The Symbolics machines came with emacs and traditional edit a file, load/compile a file kind of editing.
I believe the Symbolics machines were much more successful in the market, however, both kinds of machines are pretty much dead, but fwiw, the emacs style still survives.
That said, on an iPad I think this system might be quite nice.