HTTP/3 is everywhere but nowhere

HTTP/3 has been in development since at least 2016, while QUIC (the protocol beneath it) was first introduced by Google way back in 2013. Both are now standardized, supported in 95% of users' browsersopens in a new tab, already used in 32% of HTTP requests to Cloudflareopens in a new tab, and support is advertised by 35% of websitesopens in a new tab (through alt-svc or DNS) in the HTTP Archive dataset. We've developed a totally new version of HTTP, and we're on track to migrate more than 1/3 of web traffic to it already! This is astonishing progress. At the same time, neither QUIC nor HTTP/3 are included in the standard libraries of any major languages including Node.js, Go, Rust, Python or Ruby. Curl recently gained supportopens in a new tab but it's experimental and disabled in most distributions. There are a rare few external libraries for some languages, but all are experimental and/or independent of other core networking APIs. Despite mobile networking being a key use case for ... Read full article.