There are several efforts to implement QUIC and HTTP/3 in nginx. Cloudflare has it deployed in production with quiche[1], and Nginx themselves are developing one[2].
Applications sitting behind a proxy wouldn't need to be updated. The core protocol semantics of HTTP are relatively unchanged between HTTP/1.1, HTTP/2, and HTTP/3.
Applications sitting behind a proxy wouldn't need to be updated. The core protocol semantics of HTTP are relatively unchanged between HTTP/1.1, HTTP/2, and HTTP/3.
[1] https://github.com/cloudflare/quiche
[2] https://www.nginx.com/blog/introducing-technology-preview-ng...