Even as a fan of rich type systems, I can think of much worse design choices for a language than "everything is a string". "Everything is an object whose class

Even as a fan of rich type systems, I can think of much worse design choices for a language than "everything is a string". "Everything is an object whose class is determined at runtime" comes to mind. And as a former Tcl dabbler, that's also definitely not the first thing I'd pick on. `upvar` is a far more egregious violator of sanity, and I seem to recall that parsing optional arguments to a function is quite the adventure.