I think the restriction should be limited to the hostname, but I agree with you in principle. There are legitimate use cases of using unicode characters in the

I think the restriction should be limited to the hostname, but I agree with you in principle. There are legitimate use cases of using unicode characters in the rest of the URI. East Asian languages web sites for example can use the extra SEO for having an article's title on there (like English articles). But indeed, there's no reason we need unicode in the hostname/any domain names.