Reddit had a lot of "zombie" content: old popular content that was scraped and reposted by karma farming bots. If you spent way too much time lurking, you'd start to notice that you'd seen almost every post before (probably 6 months prior). It definitely has more real content than Lemmy currently does, which is why we must nourish and protect our precious little sapling of a content aggregator.
Also, clearly the clients are still new. I'm trying out Connect and Liftoff. Connect didn't indicate anywhere obvious that I had a reply and has no button I can find to reply to replies. Liftoff handled both of those better, but it also hid your reply at one point and I had to use Connect to make sure it still existed. Neither client has a button for seeing reply parents, so to be honest I do not remember the comment you replied to and have no easy way to find and read it.