Yes, bundling can potentially negatively impact caching. In the worst case, the bundles are mostly the same. Also, if your leaf component style files change rap

Yes, bundling can potentially negatively impact caching. In the worst case, the bundles are mostly the same. Also, if your leaf component style files change rapidly, you'll invalidate the hashes on large bundles pretty frequently. For this reason, I think a better solution might be to inject critical styles into a STYLE tag in the HEAD, and then deliver one style file per component. The intuition behind this is that you can do your initial render with only the original payload (ideally in the first roundtrip), and that will buy you plenty of time for the cascade of web requests to get all the individual component files. With HTTP/2 multiplexing coming, there's no much penalty there. And then you get to cache your page at the granularity of a single component.