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Look better. Dont be fooled by syntax. Learn about sum types, pattern matching, strong typing guarantees. Then look again.

But doesn't typescript provide all that?

Typescript provided none of those besides sum types.

and sum types bolted on, it something else from sum types that are idiomatic and used throughout all of the std lib.

that's my main gripe with TS: it's bolted on nature.

that's why I prefer a clean slate (like Elm, Rust, F#/Fable, ReasonML/ReScript, PureScript, or this "Grain" project)