I'm a little annoyed that they said Bigint uses cases never materialized. I've used it several times and it isn't something that's easy to transpile. A bigint class has bad ergonomics and there's no way the perf can be equivalent.
https://github.com/search?q=BigInt+language%3ATypeScript&typ...
https://github.com/search?q=BigInt+language%3AJavaScript&typ...