Typing systems for dynamic languages shouldn't be viewed as crutches for the inexperienced dev - experienced devs should seek them out when the ROI is there. I

Typing systems for dynamic languages shouldn't be viewed as crutches for the inexperienced dev - experienced devs should seek them out when the ROI is there. If any level of your tech stack offers you guarantees, use them so that you have less code to write. Less code is less opportunity for bugs and faster development.