One clearly underestimated programming language is Lua. I’m using it now to transform the ELF output of GCC to a Newton NSOF file. It’s amazing how flexible Lua is, and it would definitely be my first choice for any kind of system to replace the Newton. And it looks at least a bit like NewtonScript. The only thing missing are symbols, but I guess that adding them would mean adding a whole new paradigm or way of programming to Lua. This is where the less flexible NewtonScript is still ahead of most mainstream programming languages.