Thanks for the response and the URL. :)

Similar to HTTP2 scenario, devs will not have a lot to do with it. Most platforms will support the standard once it's out, since it is all about connection initiation and handshakes.

I found that H3 is being used by google and it's CDNs. So it YouTube. Pretty sure many gaming servers use H3 too. You can try it out yourself too.

Let's see how it changes things. I am not entirely sure how it might affect the dev community though.