Argo Tunnel doesn't 'compete against web standards'. I'm really surprised that people are somehow claiming that Cloudflare is against the open web in some way when we've done so much to progress it (e.g. through early support for SPDY and HTTP/2 and now with QUIC including an open source QUIC implementation in Rust).

Argo Tunnel does a specific thing: make a connection from a client's server to Cloudflare (rather than the other way around). This is helpful from a scaling perspective (why have a load balancer when we can do it?) and a security perspective (no open ports). If there was a standard that did the same thing as Argo Tunnel we'd adopt it.