I'd argue the JS engine in browsers is _also_ built for JS developers, and even though we are definitely a minority compared to all the internet users it's impo

I'd argue the JS engine in browsers is _also_ built for JS developers, and even though we are definitely a minority compared to all the internet users it's important to underline that most of the stuff currently available online, for better or for worse, wouldn't exist without developers writing it. Like the average user in fact couldn't care less about what languages websites are written in, but if browsers shipped only a brainfuck compiler I'm sure there would be a lot less development happening on the web, in some sense JS developers are the target users of JS engines. I think this is literally the first time that I hear anybody saying that TypeScript is very fast. It's no coincidence that the top open issue in Deno's repo is literally titled "TypeScript compiler in Rust" [0]. The developer behind swc is even rewriting the whole type checker in TypeScript [1]. A lot of people, myself included, think that TS can get excruciatingly slow, in a large-enough but not really huge codebase, in a way that probably wouldn't happen if it were written in something like Rust with a big focus on performance. [0] https://github.com/denoland/deno/issues/5432 https://github.com/denoland/deno/issues/5432 [1] https://github.com/swc-project/swc/issues/571 https://github.com/swc-project/swc/issues/571