I also believe it is useful, but the spam is making the Usenet less interesting. Maybe a ban of Google Groups will help things a little bit. But it is not very practical. Google itself has to do something about the abusing of their service.
There are free NNTP servers on the IPv6 network that carry binaries. I'd suggest checking them out and get yourself ready for the transition. How can I use an IPv6 service, as I am still on an IPv4 network?