[adamscybot]

People are talking the other points to death but on the toolchain front, you might enjoy https://github.com/evanw/esbuild, which is rapidly gaining in popularity. Just 1 thing for bundling, transpilation etc. And its terrifically fast since its written in Go (ironic I know).

[spion]

There is also swc which is fast because... its written in Rust https://swc.rs/

But there is also sucrase which is fast because.. its written in TypeScript? https://github.com/alangpierce/sucrase