Major CDNs seem to be adopting HTTP/3 just fine: Cloudflare: https://blog.cloudflare.com/http3-the-past-present-and-future/ https://blog.cloudflare.com/http3-t

Major CDNs seem to be adopting HTTP/3 just fine: Cloudflare: https://blog.cloudflare.com/http3-the-past-present-and-future/ https://blog.cloudflare.com/http3-the-past-present-and-futur... Akamai: https://developer.akamai.com/blog/2020/04/14/quick-introduction-http3 https://developer.akamai.com/blog/2020/04/14/quick-introduct... Fastly: https://www.fastly.com/blog/why-fastly-loves-quic-http3 https://www.fastly.com/blog/why-fastly-loves-quic-http3 Not to mention Google, which uses it a lot for regular pages and for content (eg: YouTube video). Adoption client-side also seems to be moving quickly too. I looked at the stats for 2 of my sites and HTTP/3 is now at 60-70%, with HTTP/2 having dropped to 25-30% already.