If you are looking for a reverse proxy with good HTTP/3 support, I recommend Envoy. Configuring it is a bit of a chore, but it feels like it was engineered from first principles to be the best possible HTTP/2 and 3 reverse proxy. The architecture for HTTP is entirely based around the h2 protocol, unlike NGINX which splits requests into various phases and struggles to support things like bidirectional streaming and upstream h2. (One down side is that it really is a reverse proxy; no static file serving or anything like that. But if you know what you need it can be great.)
I do hope to see more QUIC and HTTP/3 support, but to be honest, even h2 support in many cases sucks pretty hard. The Go HTTP interface is still pretty much HTTP/1 oriented and really needs a rehaul, and even the h2 implementation feels like it still lacks some battle testing. I think that is a damn shame.
Envoy is so much more. We used it for gRPC, service discovery, health checking, dynamic failover, and so much of our at-scale service topology at my last place.
I've run into production bugs with Go HTTP/2 at multiple different jobs. They are now fixed, but I'm personally not confident that those were the last ones. I could look them up and link them if you're actually curious, but I'm not sure that will be convincing, you can obviously link to bug reports for anything and claim it's unstable, I can only speak of my personal experience.
Good question! I have nothing against Traefik. I just haven't used it as much, whereas with Envoy I've both used it and contributed to it a little bit too.
I do hope to see more QUIC and HTTP/3 support, but to be honest, even h2 support in many cases sucks pretty hard. The Go HTTP interface is still pretty much HTTP/1 oriented and really needs a rehaul, and even the h2 implementation feels like it still lacks some battle testing. I think that is a damn shame.