[rdoherty]

It's not just the untyped problems, the runtime definitions of functions, properties, etc make it nearly impossible to debug unless you have the state of your production data locally. (Or you ssh into your prod server and open up a REPL, load the state and introspect everything there). Good luck debugging locally in a nice IDE. It's a horrific nightmare. I use to love Ruby until I had to debug it live.

[antod]

Yeah, dynamic typing is one thing, but the magical dynamic imports into the processes globally scoped namespace add another level to debugging difficulty.

At least in Python (as a comparison example), imports are only available in the module doing the importing - it's more explicit. You'd have to really work to get the same "everything all at once" as Rails has.