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Just wrote about achieving some benefits of static typing in Ruby by not making everything some hash blob of symbols and methods that take options hashes:

https://naildrivin5.com/blog/2024/09/25/achieve-static-typing-benefits-in-ruby-with-keywords-args-and-class-constants.html

Keyword arguments are very powerful, and since class constants are objects that can be assigned, those can be used in a lot of places where e.g. Rails would use a symbol that is later mapped to a class via convention. Just use the class!