The people that run HN don't seem to be interested in doing so, and they almost never post here (except like one time: http://arclanguage.org/item?id=19389). So getting even an updated Arc release hasn't happened, nevermind actually letting the community push Arc forwards.
The community is definitely stagnant. PG has been the driving force behind its publicity, so because he hasn't said anything about Arc in a while, there isn't new blood coming in.
