[londons_explore]

I think the benefits are where some automated system writes your "preload" entries for you.

For example, a webpack stage could render inside a sandbox each page of your site, detect which resources get loaded, and add all of those as preload/server push entries. The server itself can keep records of which resources have been pushed to a specific client, and not push them again.

Writing preload lists by hand is never going to scale with today's web apps with hundreds or thousands of requests for a typical page.