Status of EXproc

Hi again,

while learning about EXPath, I also found out about EXproc, but that doesn't seem to be a particulary active project (On http://exproc.org/  you'll find "Last updated on 18 Oct 2016 at 09:08a.m. GMT-05:00 by Norman Walsh").

What's the status of this project? Has this been superseded by xproc3?

Best,
Denis