I noticed that @julien wasn't around and he doesn't turn up in search. Did he delete his account? That would be a pity if he did.
I really liked Julien and always looked forward to read his answers. I too noticed that he was not answering any questions of late, however, I did not think that he would have left the site. He is too valuable a mathematician to this site.
He had been generous enough to answer or comment on some of my questions and hence I traced him through them (hope he does not delete them now!).
Although, I do not know if it is a good idea to divulge his name here if he wishes to remain anonymous for some reason.
Yeah, it would be a great loss for the community if he wishes to leave.
EDIT: This is just to inform that Julien seems to have come back to the site. Cheers!