Io has been around for a long time, indeed. I thought it was great, writing an Io interpreter in C was a lot easier than almost anything else, so for learning l

Io has been around for a long time, indeed. I thought it was great, writing an Io interpreter in C was a lot easier than almost anything else, so for learning language internals, it is awesome, and I'd even say a great companion to LISP, to play around with how different first principles affect programming -- something that is obscured in mainstream languages, making it harder to learn how the guts work.