Sometimes it’s not a matter of just enabling http2 and be done with it. HTTP2 requires a different mindset and implementation approach to take advantage of the way it works, and this approach will actually harm performance on users who don’t have the browsers that support http2.
Whether you’ve already migrated your site to HTTP/2 or you’re bracing yourself to take the plunge, there are challenges when it comes to tuning your site’s front end architecture to be the most performant it can possibly be for all your users. Perhaps you’ve read about what it takes to get your site ready for HTTP/2. Perhaps you haven’t.An excerpt from Using HTTP/2 Responsibly: Adapting for Users