An option for ARC/non-ARC would double the testing effort at least.
Given that over the years I learned how to mix objects and interfaces when necessary, I for myself feel quite comfortable with the non-ARC approach.
Is there a possibility that I get redirected to the comment I clicked on the the stream instead to the top of the thread? Better to the first unread comment in that stream. I think that is the behavior of the German forum: When I click an entry in the portal I end up at the first comment in that thread I have not read yet.