[mike_d]

HTTP/2 prioritization is a lot of hype for a theoretical feature that yields little real world performance. When a client is rendering a page, it knows what it needs in what order to minimize blocking. The server doesn't.

[youngtaff]

Yes, which is why the browser send priorities with the requests but many servers ignore these and just server responses in what ever order suits them.

If a low priority response is served before a high priority one the page is likely to be slower to render etc.