I'm not familiar with their implementation, but it could be that the bundling is only a temporary solution for browsers that don't support import maps. Or a lig

I'm not familiar with their implementation, but it could be that the bundling is only a temporary solution for browsers that don't support import maps. Or a light layer on top of it. Import maps are pretty cool, you don't need to bundle in modern browsers and it plays to http2's parallel request strengths.