> A more concrete problem is displaying and explaining nested scope, closures and shadowing. That's what really killed it for me and also one of the things tha

> A more concrete problem is displaying and explaining nested scope, closures and shadowing. That's what really killed it for me and also one of the things that I found pretty surprising. Tracking references is apparently way harder than I realized. And while I thought we could come up with a decent way to do it, it really did just confuse people. I tried a bunch of different strategies, from names, to boxes that follow you around, to dataflow graphs. None of them seemed to be good enough.