> A good web forum is vastly superior to mailing lists.
This is easily refutable - one can make a web frontend to mailing list that imitates the look of any forum. Getting forum into email client (or other frontend) not so much ;-P
This is more to do with how USENET is run rather than NNTP as a protocol.
Fundamentally there is very little difference between NNTP group and mailing list except the former having no spam filter and moderation.
It would be great if all mailing lists provided at least read-only access to archives via NNTP. I miss gmane as my one stop shop for all mailing lists.