I use the Typescript compiler to report errors to the shell, but that's it.

Both Bun and Node.js will execute Typescript directly without a compile step. If you are able to write your own front-end bundler then the front-end code also gets the same type stripping from either Bun or Node.js. Since both Bun and Node.js start up my large applications about twice as fast as the Typescript compiler executes I don't see any reason to bother.

This is like saying you only use your car for transportation, but you don't sleep in it anymore because your bed is more comfortable.