> Quoting is insane and hard to get right.

On the contrary, compared to e.g. bash, unless you're doing something super unusual or wrong, you rarely have to think about quoting in Tcl. Use "" when you want substitution, {} when you don't, {*} when you need to pass a list as multiple words, construct lists and dicts using their appropriate constructors and never by hand — and you're safe. Unlike bash, quoting in Tcl is dead simple, predictable and never surprising.