I see AFS every day. When we moved into our current house, my daughter, whose initials are AFS, got hold of a Sharpie and proceeded to initial every surface in the house she could get to until my wife found her and curtailed her exhuberant tagging. I still (12 years later) find “AFS” scrawled in places I didn't know she had so tagged. And we haven't had the heart to remove them all anyway.
Well, back in 2003 it was still quite used at CERN, not sure about nowadays.
It's still used at CMU, at least.
If anywhere it should be there, since it's named after the those two Andrews. MIT was big into it back in the day, not sure about now.
I used it a lot at Chicago in the early '90s, then never again. I always liked the idea, but Jesus Haploid Christ was it ever a PITA to set up (I'm looking at YOU, Kerberos.)
My high school used AFS and Kerberos at least up to 2007 (when I graduated, and my first-hand knowledge ends). Agreed on the pain.
It still is!
Related: the latest (1.7.x) OpenAFS for Windows is a native Windows file system.