I wouldn't say so, none of the stuff I had (except for that leak just now which
wasn't that significant) was ORC specific. In fact, ORC here only has the one
specific pitfall with causing a leak which you can circumvent if you know about
it.

ARC/ORC in general have the entire data race thing which is a hard problem in
general. You can take the easy route there with just deep copying the messages
you send.

Beyond that I'm not fully sure