[5d41402abc4b]

HTTP/1.1 is still heavily used in embedded system.

[jeroenhd]

But is DoH? If your library is too old to support http2, what are the chances you've upgraded the DNS resolver to a DoH resolver?

Luckily it's pretty easy to run your own DoH server if you're deploying devices in the field, and there are alternatives to Quad9.

[5d41402abc4b]

Its not about age, its about complexity. HTTP/1.1 client is trivial to implement.

[advisedwang]

We're talking about an HTTP/1.1 server here