I would argue that self-hosting hundreds of Nodejs modules might still be a better choice than the alternatives, specially since it give a easier time for bundl

I would argue that self-hosting hundreds of Nodejs modules might still be a better choice than the alternatives, specially since it give a easier time for bundling tool such as Webpack to workout what it needs to do in order to bundle the project in a better way. And, let's don't forget creating a self-hosted CDN service to serve those bundles is not really THAT hard. (also creates job ops)