Chrome set's the exclusive flag on it's H2 requests so although the requests might be dispatched in parallel servers may still queue the responses. Preload is

Chrome set's the exclusive flag on it's H2 requests so although the requests might be dispatched in parallel servers may still queue the responses. Preload is as much of a foot gun as it is a useful tool - it's way too easy to preload content that then delays other more critical content, and it takes time to find the balance