> And (from what I can tell), Windows support with node.js isn't perfect either, otherwise tools like rimraf wouldn't be needed.

I don't see how rimraf is related in any way. If you want to remove folders by calling a shell command (with full knowledge of all potential security and portability risks), your code is going to be platform dependent - it's not Node's responsibility to reimplement bash and/or GNU coreutils to make it magically work. Therefore, you need a Node re-implementation of the same functionality, either in the standard library or as a package.

And besides, rimraf has been unnecessary for a couple of years now, as Node's standard library includes a direct replacement: https://nodejs.org/docs/latest/api/fs.html#fsrmsyncpath-opti....