"As someone who would like to avoid going to the trouble to implement HTTP2 (...)" Good luck with that. Google has been incredibly adept at using the leverage

"As someone who would like to avoid going to the trouble to implement HTTP2 (...)" Good luck with that. Google has been incredibly adept at using the leverage of their search engine to make webmasters adhere to best practices. ("mobile friendly" e-mails lately, anyone?) Once HTTP/2 lands as a default in Chrome, Apache, Nginx, and Netty, of course they'll push HTTP/2-friendly sites higher in search results.