Challenges in HTTP/2.0

The flaws of HTTP/1.1 was already mentioned on many papers, for example head of line blocking, high latency, taking many TCP connections, etc. So I have one question related to HTTP/2.0 as follow: What is the challenges in HTTP/2.0?

You probably want to watch for a more complete perspective. In short, putting everything on one connection and congestion controller is advantageous when you’re on a lossless link, but degrades more quickly than HTTP/1.1 (or rather, than parallel TCP connections) in the presence of higher loss rates.

Thank you for your reply .