That said, it wouldn’t do much in your scenario unless other UIs did something similar (i.e. you’d still need to cross-reference you comments to accommodate other UIs that view them separately). It would just make it easier on you to participate in conversation on 3 posts simultaneously. I guess it would be a bit easier to cross-reference your comments since you could do it from the same page, though.
You're right, and something else to consider, I use the Lemmy web client, not a mobile app client.