Interesting stats: Cloudflare measures that 25% of visitors are ready for HTTP/2, 50% have SPDY but not yet HTTP/2, and 25% are HTTP/1 only. I hadn’t realized the SPDY adoption in client browsers was so high, actually.
Originally shared by Abraham Williams
Surprised that it is so low. Chrome Firefox and IE11 support at least one of SPDY or HTTP/2. And Microsoft will drop support for anything below IE11 on 12th January 2016. So it ought to be near full deployment by now.
Edit. Ah wait. There are some platforms on which older IE versions are supported. But for your regular desktops Windows 7 and up it’s IE11
https://support.microsoft.com/en-us/gp/microsoft-internet-explorer