Why NNTP is not default protocol for php groups

Hello, I've seen this subject before, but never really got any answer. PHP have news server at news.php.net but it is 'always' down and it is only a mailing list mirror, so some messages get lost or get 'out of thread'. I dont have to say that you will save your self, and to us, subscribers a lot of bandwidth. I host my own mail server and e-mail is charged even if I dont read it. If I read newsgroups, i will download headers only and than messages I want to red. This way you will save at least 30% bandwidth because many people would download only messages they want to read. Now you have to mail every subscriber. If somebody still prefer mailing lists, you can easily create news->ezmlm gateway, but focus is that NNTP is the primary way to communicate (and to have good news server, not the broken one like now. I bet that current mailing list server can host double subscribers news server). What do other subscribers think? TNX and sorry for bad English.