>>pimter+(OP)
Google/Microsoft/Apple essentially did this with HTTP/3 too. None of their shipped browsers are able to connect to a non-"CA TLS" HTTP/3 endpoint. To host a HTTP/3 website visitable by a random normal person you have to get continued approval (every 3 months min) from a third party CA corporation for your website.
>>2OEH8e+z1
Yep. LetsEncrypt is great but everyone centralizing in them is not so great. Normal browsers having the ability to connect to a bare HTTP endpoint in HTTP/3 would solve any problems that might arise from this centralization. It's a straightforwards and easy thing to fix for the HTTP/3 lib devs and mega-corp browsers using those libs. But no one cares about it.