the libraries in question are still there. they didn't fell off the face of the earth, they are still in git, they still have tarballs, and they are still at the same level as they were before GNOME 3.0 was released.
GNOME didn't do anything, except say that nobody is working on those libraries any more, except for eventual security issues; patches coming from distributions have been folded back, whenever applicable, and releases have been made.
if you want to maintain old libraries, you're absolutely encouraged to do so: just ask for a Git account, or push clone on github/gitorious if you want to, and ask distributions to switch over to your tarballs.
if that's not to your satisfaction then I'm sorry: you have a profound issue with the whole "free software" thing.