AFS suffers from sole-vendor-ism
Elaborate. AFAIK, nobody is selling supported AFS implementations at the moment. The OpenAFS and Arla projects are free for anyone to contribute to, and there is even a stripped down AFS implementation provided by Red Hat.
I used to be a die-hard AFS user, but now have gone laptop and CVS replaces my need for network filesystems.
Guess what? Other people have different needs in a network filesystem besides using it as a text file repository. AFS's global namespace and the control it gives individual administrators over sections of that namespace is one of its most useful characteristic (besides caching, security, and compatibility with existing implementations, of which NFSv4 has finally added the first two at the expense of the latter).