> However, we are reaching the end of life for the libraries and code that support HTTP/1.1

What libraries are ending support for HTTP/1.1? That seems like an extremely bad move and somewhat contrived.

I think code to implement http/1.1 in whatever software stack they use would have been shorter than the blog post...

Mikrotik DoH user here. While I don't use Quad9, I do use 1.1.1.1. I hope they don't follow suit before Mikrotik get a chance to add HTTP/2 support (if ever).

I never understood DOH over DOT. It makes sense if you want to hide DNS lookups so that people cannot block the DNS queries to ad and other scam networks.

HTTP/1.1 is still heavily used in embedded system.

NextDNS has a DOH3 (as in, http/3) endpoint but afaict it doesn't seem to always use http/3.