[acdha]

HTTP/2 definitely changed that and is near-universally supported now. The biggest win is the ability to cache things independently: with bundles your servers and clients have to retransfer everything if a single byte changes, and most of the sites I’ve worked on don’t change most of their files every time they ship an update. A cold visit will usually be immeasurably different from a bundle but a warm visit is noticeably faster.