As someone who loves Io, it gets my attention because: — the language is very mutable, almost all behaviours can be modified — it's simple, all you can do is

As someone who loves Io, it gets my attention because: — the language is very mutable, almost all behaviours can be modified — it's simple, all you can do is send messages to objects — you can write DSLs and macro-like things without special macro support — it's so dynamic you'll end up live-coding without realizing it It has less syntax than Smalltalk, it's homoiconic like Lisp, but doesn't need support for macros because of the way messages are handled. A not intolerable way of thinking of Io is it is to object calculus what Lisp is to lambda calculus. There are parts where that analogy breaks down but it's not a bad first approximation. edit: formatting