Normally I wouldn't suggest Crystal [1] with Rails Shop given how different they are, but Stripe uses a tight subset of Ruby and Type Check everything I am wondering if they have ever looked at Crystal and what are their thoughts on it. Given they are looking at Java and Go as well.
>Architected this way, the Sorbet Compiler turns Ruby into a language for writing Ruby native extensions! Instead of having to write C, C++, Rust, or some other compiled language to write native extensions, people can continue to write Ruby but gain the benefits of native compiled speeds.
To me this is the biggest feature that could impact the whole Ruby Ecosystem. Along with another Ruby JIT that is currently being tested at Shopify.