We are still type checking, it's just not needed as a dependency for our JS outputs. Type checking still happens in tests, and I have CI tasks and VS Code watch tasks which will make sure we are still type checking.
It's not perfectly cut and dry, but mostly. We still need to emit d.ts files for our public API, and the only thing that can do that is tsc, which will type check.
But I tried my best to make the build have fast paths to minimize the development loop as much as possible.
