I wonder if they will write a TypeScript type checker in rust? TypeScript currently only has one serious implementation that actually checks types (esbuild, for example, does no type checking). Getting another one that's written in rust would be tremendously helpful for type checking times!

But, on the other hand, if they don't write a type checker in rust, we may still need `tsc`. Since Rome won't be written in JS/TS, I worry that calling The official TypeScript compiler from rust may be prohibitively expensive, necessitating users to run a separate `tsc` process. That goes against Rome's goal of having a single AST generated once by a single tool