It's great for pushing a small bundle of static assets (e.g. <250kb) in advance of the HTML to make pageloads first-time visitors nearly instant. (e.g. for land

It's great for pushing a small bundle of static assets (e.g. <250kb) in advance of the HTML to make pageloads first-time visitors nearly instant. (e.g. for landing pages, public sites, blog posts, etc.) It's bad for pushing large bundles of JS and images to every visitor that already has them cached (which is unfortunately how it was misused in practice).