HTTP/3 IS EVERYWHERE BUT NOWHERE

Summary from the TLDR newsletter

HTTP/3 has been in development since at least 2016. While almost a third of web traffic has been migrated to it already, neither HTTP/3 nor QUIC (the protocol beneath it) are included in the standard libraries of any major languages. There are a rare few external libraries for some languages, but all are experimental and/or independent of other core networking APIs. Rollout of HTTP/3 has barely started rolling out to any popular open source tools. Underlying organizational differences are causing a split in technologies on the Internet. The technology is great, but it's a challenge if those benefits are not evenly distributed and only accessible to a small set of organizations and their customers.