I more or less do that as well, but after each comment, I’m dropped back on the thread that I’m still halfway through. Depending on how I scroll and how the comments are re-ordered (as they’re voted on), I’m subject to crossing sub-threads, especially on mobile and when I’m partly killing time. In this case, I was in an Uber and then an airport so a little more prone to start-stop even within the one article.

That’s an explanation and not really an excuse. This one was sloppy, as I guess they all would be.