It looks like you can reply once to the OP and then someone can reply to your response. But how many levels down does that go on here? Can we test it on this thread? I know UB went down like 5 levels and then everything after that would be on the same level. I'm wondering what happens here. The back and forth sort of subconversations are often where things get interesting!

Yes, it would be great if we could see who replies to whom. Thank you, Queen of UB2.
can we delete here with no time limit?
This is a good suggestion. I'll try to figure it out!
OP: ok, so it looks like you can respond to the OP or a one level OR but that's it. Not to sound ungrateful to our host, who did an amazing job putting this together so quickly and saving us all from the inevitable collective panic attack of UB closing with nowhere else to land, but is that something that could be revised?
Testing first OR.