Hi, I just see this interesting blog/demonstration[1] about using new ruby types in ruby 3.1 ( btw TW still does not have 3.0 ). So maybe you find it also interesting what happens on ruby field. There is also summary what happens on ruby language in past year at [2]. Josef [1] https://bignerdranch.com/blog/live-ruby-type-checking-with-typeprof-ide/ [2] https://bignerdranch.com/blog/where-is-ruby-headed-in-2021/