[xyzzy4747]

Why use a 3rd party add-on solution instead of using something better in the first place?

[ricketycricket]

You mean like Typescript, an add-on that transpiles to Javascript?

[askonomm]

I'm sure they meant an actual statically typed language. I agree that dynamic languages are fun and productive ... until the codebase becomes big and complex, and then not knowing what shape any data is quickly becomes a nightmare to understand and debug.

[Alifatisk]

RBS comes by default with Ruby, Sorbet is 3rd party.