Sorbet = Ruby + types

 Types will win in the end with Jake Zimmerman, Stripe working on Sorbet (Changelog Interviews #548) |> Changelog

Stripe working on Sorbet — an open source project that does Type checking in Ruby and runs over Stripe’s entire Ruby codebase. As of May of 2022 Stripe’s codebase was over 15 million lines of code spread across 150,000 files.

sorbet.org

Getting started with Sorbet

Sorbet: Stripe’s type checker for Ruby

Justin Searls